Print all possible words from phone digits java Can you solve this real interview question? Letter Combinations of a Phone Number - Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. read more Strings Mathematical Recursion DSA Arrays Amazon Flipkart Samsung Snapdeal Accolite Jul 23, 2025 · The idea is to start from an empty output string (we call it prefix in following code). For example, given the digits 1, 2, and 3, the goal is to produce all permutations such as [1, 2, 3], [1, 3, 2], [2, 1, 3], and so on. java Top Print all possible words from phone digits. permutations itertools. We are quite familiar with the QWERTY keyboard style that we use today. ” we look at the letters it corresponds to (‘a,’ ‘b,’ ‘c’) and start with one of them. Your task is to return all possible letter combinations that the number could represent, similar to how letters are mapped on a telephone keypad. Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. next (); HashMap < Character, String > hm = newHashMap < Character, String > (); //creating hash map like dial pad in phone We have to print all possible words that can be formed by pressing those digits of the mobile keyboard using c++. Letter Combinations Of A Phone Number Problem Statement Given a string containing digits from inclusive, return all possible letter combinations that… Problem Description You are given a string containing digits from 2 to 9 inclusive. This means we should generate all possible permutations of words using the given characters, with repetitions and also upto a given length. Print all possible words from phone number digits. 2 seconds Please like and share About Print all possible words from phone digits 0, 1 - NULL 2 – ABC, 3 – DEF, 4 – GHI, 5 – JKL, 6 – MNO, 7 – PQRS, 8 – TUV, 9 – WXYZ. Oct 16, 2025 · In various real - world applications, there is often a need to convert a phone number into words. List all words which are possible by pressing these numbers. Once the size of the current combination becomes equal to r, we store or print that combination. cpp at main · pavanmgowda20/Recursechallenges Jul 15, 2025 · The task of printing all possible combinations from three digits in Python involves generating all unique ways to arrange the digits, considering their order. A mapping of digits to letters (just like on the telephone buttons) is given below. Oct 2, 2015 · If the phone number is not empty, take the first digit and convert it // into possible letters. Using a dictionary, the following output could have been optimized to print MAD, OCD, … so on based on their frequency of use by the users. Input will be containing a combination of phone number digits. Possible Words From Phone Digits Difficulty: Medium Accuracy: 52. Feb 14, 2025 · The idea is to recursively generate all possible substrings of the given string s. 2K subscribers Subscribe Nov 17, 2013 · I am having problems with this programming assignment (It's homework) The goal of the program is to look up all the 7 digit phone numbers in an input file and find the possible words that they may In this video, I have solved and explained the Geeks for Geeks daily challenge question of "Possible Words from Phone Digits" using Python maps and recursion in 0. 9K subscribers Subscribe 12. What I am trying to do is print all the possibilities of a binary number n digits long. Sep 30, 2025 · The idea is to use recursion to build all possible words step by step. Given a keypad and an N digit number which is represented by array a [ ], the task is to list all words which are possible by pressing these numbers Example : Input: N = 3, a [ You are given a keypad (as shown in the diagram) and an array arr [ ] containing digits, your task is to list all possible words in any order which can be generated by pressing numbers in arr [] sequentially. For more details, please go through - Print all possible words from phone digits Given a keypad represented by an integer array arr [] containing digits from [0, 9], the task is to print all possible letter combinations that the numbers could represent. May 20, 2025 · Starting from the first index, we try all possible elements that can be placed at that position such that the remaining elements can still fill the combination of size r. Phone number word finders, like the one here on Hanging Hyena, convert digits into different letter combinations. For every character added, print all possible strings with current prefix by recursively calling for k equals to k-1. in); Strings = sc. For each letter, add that letter to the prefix // and then call recursivePrintAllPossibilities with the new prefix, and // with the now-truncated phone number. For e. Implementation of Data structures and Algorithms at Apni Kaksha Java Placement Course - GitHub - Anuj-Kumar-Sharma/DS-Algo: Implementation of Data structures and Algorithms at Apni Kaksha Java Plac Print all possible words from phone digits Last Updated: 28 January 2025 Given a keypad represented by an integer array arr [] containing digits from [0, 9], the task is to print all possible letter combinations that the numbers could represent. A mapping of digits to letters (just Print all possible words from phone digits. This repository contains solutions of GeeksforGeeks coding problems - joydas65/GeeksforGeeks Given a keypad as shown in the diagram, and an array arr[ ], your task is to list all possible words in any order which can be generated by pressing numbers from array. Note that 1 1 does not map to any letters. e. Output format: For each test case, print all the possible strings separated by a single space in lexicographically sorted order, that can be formed from the input string by mapping the digits to Print all possible words from phone digits Before advent of QWERTY keyboards, texts and numbers were placed on the same key. Apr 26, 2025 · Given two numbers n and k, you have to print all possible combinations of k numbers from 1n. 0) Sep 17, 2025 · Given `n` lists of characters and a number whose digits lie between `1` and `n`, print all possible combinations by replacing its digits with the characters of the corresponding list. May 17, 2022 · Today is day 9 of 30 days challenge and I and doing the "Possible Words From Phone Digits" Question on Geekforgeeks which is asked on Flipkart and Microsoft Can you solve this real interview question? Letter Combinations of a Phone Number - Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Note: Return an empty array if no possible palindromic string can be formed. Otherwise, print "No". Note that 1 does map some characters but no letters. A mapping of digit to letters (just like on the teleph Feb 13, 2025 · Given a string s, consisting of lowercase Latin characters [a-z]. Convert phone number to words Convert words to phone number Convert phone number to all letter combinations Enter a phone number. Your Task: You don’t need to read input or print anything. Consider you entered the mobile number Given 2 huge numbers as separate digits, store them in array and process them and calculate the sum of 2 numbers and store the result in an array and print the sum. I have to form all the possible numbers that can be formed from the above list of the given length. ly/3K55Omf :) Letter Combinations of a Phone Number solution Letter Combinations of a Phone Number Leetcode Letter Combinations of a Phone Number C++ Letter Combinations of a Phone Number Java Letter Possible Words From Phone Digits Given a keypad as shown in the diagram, and an N digit number which is represented by array a [ ], the task is to list all words which are possible by pressing these numbers. One mapping of digit to letters (just like on the telephone buttons) is given below. The first line of each test case contains a string S. Searching for just the right toll free number to advertise? I’m happy to share that I’ve obtained a new certification: Back End Development and APIs from freeCodeCamp! It took about 30 hours. Print all possible words from phone digits (Somewhat like this). lottery numbers) 4 (~ 4. If 0 or 1 comes we need to break as there will no iteration for these digits. We print the result whenever we reach the last list and output contains one elements from each of the n lists. cpp at master · Raaniaa/phone-digit May 15, 2022 · I wish to create all permutations of all digits from a function. Below is the implementation of above idea : Dec 9, 2024 · Data Structures & Algorithms (Leet Code 17 -Java) : Letter Combinations of a Phone Number Problem Statement : Given a string containing digits from 2-9 inclusive, return all possible letter … Print all possible words from phone digits 0, 1 - NULL 2 – ABC, 3 – DEF, 4 – GHI, 5 – JKL, 6 – MNO, 7 – PQRS, 8 – TUV, 9 – WXYZ. *; /* MODEl-1:USING COLLECTIONS */ classMain { publicstaticvoidmain (String [] args) { Scannersc = newScanner (System. We need to print all possible words with given number. Below is the implementation of above idea : Dec 9, 2024 · Data Structures & Algorithms (Leet Code 17 -Java) : Letter Combinations of a Phone Number Problem Statement : Given a string containing digits from 2-9 inclusive, return all possible letter … Combinatorics Select 3 unique numbers from 1 to 4 Total possible combinations: If order does not matter (e. The Recurse Challenges file in GitHub repositories typically contains a set of coding challenges designed to help developers practice recursion techniques. 7K subscribers Subscribed 12. The user enters a number and we have to print all the possible combinations of words that can be formed in the old mobile keyboard. Output : a b aa ab ba bb The solution is to use recursion on the given character array. In this blog post, we will explore the core concepts Day 81: Possible Words from Phone Digits Today’s #nationskillup challenge was about generating all possible words from digits on a phone keypad. Watch the video to see the step-by-step implementation and understand the time and space complexities involved. We have to find all possible letter combinations that the number could generate. e. Then, the 'T' test cases follow. We are quite familiar with the QWERTY keyboard style that we use today. Example Algorithm C++ Program Nov 14, 2020 · Hello fellow devs 👋! Today we are going to discuss a popular problem which is asked by many tech giants in coding interviews. Oct 25, 2023 · 2. The outermost loop iterates through the first digit (i) from 1 to 4. The idea is to pass all possible lengths and an empty /* Given an integer N, print all the N digit numbers in increasing order, such that their digits are in strictly increasing order (from left to right). But before the invention of QWERTY keypad phones were fitted with keypads with 12 buttons and each button contains words and numbers both. 2K subscribers Subscribe 27:19 • Prerequisites D-585 |Possible Words From Phone Digits |GFG POTD today 3 October 2025 solution | Problem Of The Day Akshay Anil 6. Oct 18, 2016 · My question is How many words are possible with seven digits with each digit representing n letters? When we press 2,3,4 while typing a text possible words which can be formed are (Alphabetical order): if input number is 234, adg adh adi aeg aeh aei afg afh afi bdg bdh bdi beg beh bei bfg bfh bfi cdg cdh cdi ceg ceh cei cfg cfh cfi Nov 26, 2020 · Suppose we have a string containing digits from 2-9. Strings List All Possible Words From Phone Digits A R Add Explanation Add Implementation © The Algorithms 2021 Jan 3, 2021 · PROGRAM TO SOLVE SUDOKU # A Utility Function to print the Grid def print_grid (arr): for i in range ( 9 ): for j in range ( 9 ): print arr [i] [j], print ( 'n' ) # Function to Find the entry in # the Grid that is still not used # Searches the grid to find an # entry that is still unassigned. One by one add all characters to prefix. Each digit maps to certain letters, and at every step we choose one letter from the current digit and add it to the growing string (prefix). Jan 17, 2020 · In this problem, we are given a number and we have to print all words that can be formed by pressing those words in an old fashioned mobile keyboard. Find out all the possible palindromes that can be generated using the letters of the string and print them in lexicographical order. - Recursechallenges/Print all possible words from phone digits. Aug 3, 2023 · In this question, given a string containing digits from 2–9 inclusive, you are required to return all possible letter combinations that the number could represent. Jul 23, 2025 · Print all possible words from phone digits Mobile Numeric Keypad Problem Recursively print all sentences that can be formed from list of word lists Position of robot after given movements Check if a given sequence of moves for a robot is circular or not Function to find Number of customers who could not get a computer Sep 16, 2018 · Prompt: Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Print all possible words from phone digits. 2) Create a tree with digits for 2nd number as level 2 3) repeat for all numbers 4) For level 1, attach tree for digit 2 at all edges of level 1 For level 2, attach tree for digit 3 at all edges of level 2 etc Of course, not as efficient as the above algo in terms of space and time complexity By: raj what about duplicates? say if the input is Input format: The first line contains an integer 'T' which denotes the number of test cases or queries to be run. Today, I will share with you the complete analysis process of this sample. Just print different strings in new lines. The digit-to-letter mapping follows the traditional phone keypad layout: 2 maps to "abc" 3 maps to "def" 4 maps to "ghi" 5 maps to "jkl" 6 maps to "mno" 7 maps to How to print possible combinations of words from phone digits Problem statement Find all the possible combinations of the words formed as a result of some number which is given by the user. A mapping of digits to letters (just like on the telephone buttons) is being followed. - phone-digit/main. However, unlike text, we don't put numbers inside double quotes: How do you generate all possible letter combinations from an array of phone keypad digits? Nov 1, 2014 · the user presses 1,2,3 so there are 3 digits & each digit has 3 chars associated with it. In other words, with a 4 digit number: 0001 0010 0100 1000 . Nov 8, 2022 · Help Peter make a list of all possible passwords using N digits. Each digit on a mobile keypad corresponds to a set of letters, and our task is to find every possible combination of letters that can be formed by pressing those digits. If Aug 6, 2022 · 12. we need to print all N digit patterns formed by mobile Keypad. Return the answer in any order. g. Using itertools. Sep 9, 2023 · Mix and Match: Then, it starts mixing and matching those letters to make words. Given a string digits containing numbers from 2 to 9, return all possible letter combinations that the number could represent based on a telephone keypad mapping (e. Examples: Input: arr[] = ["sam", "sung", "samsung"] Output: sam: sam sung: sung samsung: sam sung samsung String 'samsung' can be formed using two different strings from the array i. java Top Apr 25, 2023 · Given a number n. You have to print All Possible Words from Phone Digits. Mar 10, 2012 · I will abstract you all from all the details by presenting a similar plain-vanilla scenario. - adityasabde/Data-Structure-and-algorithms-solution. We will do the medium-level question of recursion. Note that 1 does not map to any letters. permutation for ba, would be ba and ab, but what about longer string such as abcdefgh? Is there any Java implementation example? Apr 25, 2023 · Given a set of characters generate all possible passwords from them. Store the elements and their counts in two different arrays. The following java program has written in multiple ways along with detailed algorithmic explanation with sample outputs. Contribute to 07ItachiUchiha/DSA-Platform development by creating an account on GitHub. InputThe first line of input contains a single integer T denoting the number of test cases. Possible words from phone numbers - Practise recursion and backtracking with me 🚀🔥💪 Code From Scratch - Keerti Purswani 13. Textonyms Convert Phone Numbers to Words Enter a phone number (or phone word) in any format: Optional: Enter words to exclude them from the results, or click any unwanted words in the results below to remove them. Examples: In this article, we will learn to generate all possible words from a string of phone digits using Java. lang. If "Convert phone number to words" is selected choose an English or Dutch word list to verify the Jul 23, 2025 · The idea is to start from an empty output string (we call it prefix in following code). Jul 11, 2025 · Note: This program will become more convenient for the users once we add a dictionary of words along with their frequency of use. Examples: Input: s = aabcb Output: { abcba bacab } Explanation: "abcba" and "bacab" are possible strings that are Problem Statement Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. This Gamex Trojan sample was just obtained in May and is not destructive, but it is good for security analysts. *; Dec 10, 2021 · Possible Words From Phone Digits || GeeksforGeeks || Problem of the Day || Must Watch more List All Possible Words From Phone Digits implemented in Java Dec 11, 2021 · In this video, I will be discussing the Possible Words From Phone Digits - Recursion Problem which is one of the top questions when it comes to interviews. May 12, 2025 · The code uses three nested for loops to generate all possible combinations of three digits from 1 to 4. Note : The order of strings are not important. Jul 4, 2024 · Anytime we will consider one single item. print all possible strings generated from the given keypad of the phone. Examples: Input: n = 3, k = 2 Output: [ [1, 2], [1, 3], [2, 3 Ever wondered what your phone number spells? Many phone numbers contain hidden words or mnemonics. Below is the implementation of this idea. E. Oct 14, 2023 · Problem Statement Letter Combinations of a Phone Number (LeetCode #17): Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent Latest commit History History 16 lines (13 loc) · 494 Bytes master Interview-Practice / PermutePhoneNumbers. Explore All Possibilities: To find all possible combinations, we’ll start with the first digit in our input string. util. 0) If order matters (e. so i don;t see where does 4 come from? So he took out his first feature phone, a Nokia 1100. Note: we can move up, down, left, right from any key of mobile keypad, and every pattern contains the unique key. Print all possible words from phone digits in C - In this problem, we are given a number and we have to print all words that can be formed by pressing those words in an old fashioned mobile keyboard. 79% Submissions: 75K+ Points: 4 Average Time: 20m You are given a keypad (as shown in the diagram) and an array arr [ ] containing May 16, 2017 · I was reading some programming brain teasers and saw a T9 translator teaser on Crazy for Code and wanted to go about implementing it in node. js. The problem is based on generating all possible combinations of letters from a Find Last Digit Of a^b for Large Numbers Find Nth root of M Find all distinct subset (or subsequence) sums Find all possible paths from top to bottom Find an Replace in String Find duplicate rows in a binary matrix Find nkth node in Linked list Oct 25, 2024 · In this article, we will learn to generate all possible words from a string of phone digits using Java. etc To be honest, I have no idea of where to e Combinatorics Select 3 unique numbers from 1 to 4 Total possible combinations: If order does not matter (e. Permuting Lists of Lists - Print all possible words from phone digits - Algorithms and Problem SolvingAlgorithms and Problem Solving Give /*Print all possible words from phone digits using BACKTRACKING*/ importjava. Interview question for SDE-III. Given a keypad as shown in diagram, and an N digit number. So, for each string in first list we do recurse to all other lists to find the combinations. If the string contains a valid sequence of consecutive integers, print "Yes" followed by the starting number of the sequence. . Focuses were API development in NodeJS using Express and In Java for String class there is a method called matches. The phone number may contain 3 to 10 letters and numbers separated by spaces, dashes "-" or round brackets " ( )". pick3 numbers, pin-codes, permutations) 24 (~ 24. Example 1: Input: N = 1 Output: 0 1 2 3 4 5 6 7 8 9 Explanation: Single digit numbers are considered to be strictly increasing order. For example, in some voice - enabled systems, it might be more user - friendly to pronounce a phone number as words rather than individual digits. Contribute to sanjgit/Phone-To-Words development by creating an account on GitHub. For instance, if the input is "23, " the output would include combinations like "ad, " "ae, " "af, " and so on. Given 2 huge numbers as separate digits, store them in array and process them and calculate the sum of 2 numbers and store the result in an array and print the sum. Note:0and1do not map to any letters. 6 write a Related Keywords: python print all class variables all possible domain extensions python catch all exceptions and print print contacts from samsung Contribute to umeshlilly/testing_heroku development by creating an account on GitHub. below is picture of such keypad. Feb 21, 2025 · The final output will be a list of all possible words that the digits could represent, such as "ad, ae, af, bd, be, bf, cd, ce, cf" for the input [2, 3]. Contribute to divassahu/test development by creating an account on GitHub. By pressing a digit you can access any of its mentioned characters. But before the invention of QWERTY keypad phones were fitted with keypads with Jul 12, 2025 · Given an array of strings arr [], for every string in the array, print all possible combinations of strings that can be concatenated to make that word. If you have any doubts related to the Java phone number format, just do leave a comment here. GitHub Gist: instantly share code, notes, and snippets. /* Given an integer n, using phone keypad find out and print all the possible strings that can be made using digits of input n. For example 2 has “ABC” if we wanted to write anything starting with ‘A’ we need to type key 2 once. Jun 28, 2024 · Given a string containing digits from 2–9 inclusive, return all possible letter combinations that the number could represent. To do so, create an array of string res [] to store the substrings of string s and an empty string cur to store the current string. I am given n (the no. I am also given a list of numbers say {2,4,8,9}. Let’s say it’s “2. util. Each time, it adds more letters to the words it's making. of digits of the number to be formed at run-time). Like they word 6 on the keypad will Sep 17, 2025 · Given a sequence of numbers between 2 and 9, print all possible combinations of words formed from the mobile keypad with some digits associated with each key. ToolsApkTool, dex2jar, and DJ Java DecompilerPython2. Possible words from phone numbers - Practise recursion and backtracking with me 🚀🔥💪 Lecture38: Phone Keypad Problem Recursion || C++ Placement Course Nov 12, 2021 · Possible Words From Phone Digits | Problem of the Day 11/12/21 | Yash Dwivedi GeeksforGeeks Practice 84. His friend, Aman saw him using the phone and challenged Yogi to list all the possible combinations of characters on the Number pad, for a given number. Jan 3, 2021 · PROGRAM TO PRINT ALL POSSIBLE WORDS FROM PHONE DIGITS importjava. if n = 3 and list = {4, 5, 6} Pick a new 7 or 8 digit phone number by typing in an available exchange (first 3 to 5 digits) and see what one-word numbers you can choose from. If we wanted to type ‘B’, press key 2 twice and thrice for typing ‘C’. A mapping of digit to letters (just like on the telephone buttons) is given below. Sep 8, 2022 · #competitiveprogramming #dsasheet #interviewpreparation #Java #JavaProgram Do subscribe to our channel and hit the bell icon to never miss an update from us in the future: https://bit. It tries all possible combinations by adding one letter at a time and keeps track of the words it can create. In this video, we solve the GeeksforGeeks problem "Possible Words From Phone Digits" using backtracking in Java. Check out this link: Related Article with C++ implementation : Print all possible words from phone digits Reference Can you solve this real interview question? Letter Combinations of a Phone Number - Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Interview question for Software Engineer. Example 1: May 28, 2022 · May 28, 2022 - 7 min ' read Possible Words From Phone Digits Tags : recursion, array, string, math, geeksforgeeks, cpp, medium Problem Statement - link # Given a keypad as shown in the diagram, and an N digit number which is represented by array a[ ], the task is to list all words which are possible by pressing these numbers. Java, being a widely used programming language, provides the means to implement such a conversion. How to use this method to check if my string has only digits using regular expression? I tried with below examples, but both of them retur Oct 13, 2025 · Java program to validate the phone number format in a perfect order with dashes. , 2 maps to "abc"). I would like the function to first print all possible permutations of 1 digit numbers: 1 2 3 then all possible permutations of 2-digit numbers (duplicates like 11, 22, 33 included) 11 12 13 21 22 23 31 32 33 and similarly for the 3 digit numbers. I have the array [1,2,3]. Apr 24, 2025 · Given a string s that contains only numeric digits, we need to check whether that strings contains numbers in a consecutive sequential manner in increasing order. Print all possible words from phone digits 0, 1 - NULL 2 – ABC, 3 – DEF, 4 – GHI, 5 – JKL, 6 – MNO, 7 – PQRS, 8 – TUV, 9 – WXYZ. How Javascript internally does the type conversion. *; importjava. This is repository about some practice problems of data structures. 'sam' and 'sung' whereas 'samsung' itself is also a string Print all possible words from phone digitsTable of Contents Given a string of numbers, each number represents a number on the QWERTY keyboards, texts and numbers were placed on the same key. Nov 23, 2021 · Approach: Count the occurrences of all the characters in the string using a map, then using recursion all the possible combinations can be printed. Examples: Input : arr[] = {a, b}, len = 2. With the help of a phone number word finder, you can transform these digits into interesting and memorable phrases. Keep Going: It does this for all the digits in the sequence, one after the other. Feb 12, 2014 · Calculate all possible combinations of given characters Ask Question Asked 11 years, 9 months ago Modified 10 years, 11 months ago What is an elegant way to find all the permutations of a string. Each digit (2–9) maps to specific letters, and Words From Phone Number Problem explores finding all possible words that can be formed from the digits on a phone keypad given a phone number. permutations () from itertools module generates all possible optimus-alfaomega / Java-Cadenas-Texto Public Notifications You must be signed in to change notification settings Fork 0 Star 1 Code Issues0 Pull requests Projects Security Insights 2. phone-digit Print all possible words from phone digits 0, 1 - NULL 2 – ABC, 3 – DEF, 4 – GHI, 5 – JKL, 6 – MNO, 7 – PQRS, 8 – TUV, 9 – WXYZ. You Print all possible words from phone digits 0, 1 - NULL 2 – ABC, 3 – DEF, 4 – GHI, 5 – JKL, 6 – MNO, 7 – PQRS, 8 – TUV, 9 – WXYZ. Print Numbers You can also use the println() method to print numbers. Jul 11, 2025 · Given a keypad of a mobile, and keys that need to be pressed, the task is to print all the words which are possible to generate by pressing these numbers. Oct 2, 2021 · Is your feature request related to a problem? Please describe. We will Oct 24, 2024 · In this article, we will learn to generate all possible words from a string of phone digits using Java. Apr 8, 2021 · Description: (Jump to: Solution Idea || Code: JavaScript | Python | Java | C++) Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. scz mck lgcolbg icgu htoz yldwj fyxw yytmt ecnyhn posreow ndapmp xuxec zec hayzd oavjt