Program to convert Number in characters
Given an Integer N. The task is to convert the number in characters.
Examples:
Input: N = 74254
Output: Seven four two five four
Input: N = 23
Output: Two three
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An efficient approach:
- Reverse the number.
- Iterate through the reversed number from right to left.
- Extract the last digit by using modulus, then use switch case to get the corresponding word.
- While iterating divide the number by 10.
C++
// C++ program to convert number in characters#include<bits/stdc++.h>using namespace std;void NumbertoCharacter(int n){ int rev = 0, r = 0; // To calculate the reverse of the number while (n > 0) { // The remainder will give the last digit of the number r = n % 10; rev = rev * 10 + r; n = n / 10; } while (rev > 0) { // Extract the first digit of the reversed number r = rev % 10; // Match it with switch case switch (r) { case 1: cout << "one "; break; case 2: cout << "two "; break; case 3: cout << "three "; break; case 4: cout << "four "; break; case 5: cout << "five "; break; case 6: cout << "six "; break; case 7: cout << "seven "; break; case 8: cout << "eight "; break; case 9: cout << "nine "; break; case 0: cout << "zero "; break; default: cout << "UnValid "; break; } // Divide the number by 10 to get the next number rev = rev / 10; }}// Driver code#include <iostream>int main(){ int n = 12345; NumbertoCharacter(n); return 0;} |
Java
// Java program to convert number in charactersclass GFG{ static void NumbertoCharacter(int n){ int rev = 0, r = 0; // To calculate the reverse of the number while (n > 0) { // The remainder will give // the last digit of the number r = n % 10; rev = rev * 10 + r; n = n / 10; } while (rev > 0) { // Extract the first digit // of the reversed number r = rev % 10; // Match it with switch case switch (r) { case 1: System.out.print("one "); break; case 2: System.out.print("two "); break; case 3: System.out.print("three "); break; case 4: System.out.print("four "); break; case 5: System.out.print("five "); break; case 6: System.out.print("six "); break; case 7: System.out.print("seven "); break; case 8: System.out.print("eight "); break; case 9: System.out.print("nine "); break; case 0: System.out.print("zero "); break; default: System.out.print("UnValid "); break; } // Divide the number by 10 // to get the next number rev = rev / 10; }}// Driver codepublic static void main(String[] args){ int n = 12345; NumbertoCharacter(n);}}// This code is contributed by Amit Katiyar |
Python3
# Python3 program to convert# number in charactersdef NumbertoCharacter(n): rev = 0; r = 0; # To calculate the # reverse of the number while (n > 0): # The remainder will give # the last digit of the number r = n % 10; rev = rev * 10 + r; n = n // 10; while (rev > 0): # Extract the first digit # of the reversed number r = rev % 10; # Match it with switch case switcher = { 0 : "zero ", 1 : "one ", 2 : "two ", 3 : "three ", 4 : "four ", 5 : "five ", 6 : "six ", 7 : "seven ", 8 : "eight ", 9 : "nine " } print( switcher.get(r, "UnValid"), end = " ") ; # Divide the number by 10 # to get the next number rev = rev // 10;# Driver codeif __name__ == '__main__': n = 12345; NumbertoCharacter(n);# This code is contributed by gauravrajput1 |
C#
// C# program to convert number in charactersusing System;class GFG{ static void NumbertoCharacter(int n){ int rev = 0, r = 0; // To calculate the reverse // of the number while (n > 0) { // The remainder will give // the last digit of the number r = n % 10; rev = rev * 10 + r; n = n / 10; } while (rev > 0) { // Extract the first digit // of the reversed number r = rev % 10; // Match it with switch case switch (r) { case 1: Console.Write("one "); break; case 2: Console.Write("two "); break; case 3: Console.Write("three "); break; case 4: Console.Write("four "); break; case 5: Console.Write("five "); break; case 6: Console.Write("six "); break; case 7: Console.Write("seven "); break; case 8: Console.Write("eight "); break; case 9: Console.Write("nine "); break; case 0: Console.Write("zero "); break; default: Console.Write("UnValid "); break; } // Divide the number by 10 // to get the next number rev = rev / 10; }}// Driver codepublic static void Main(String[] args){ int n = 12345; NumbertoCharacter(n);}}// This code is contributed by sapnasingh4991 |
Javascript
<script>// JavaScript program to convert number in charactersfunction NumbertoCharacter(n){ let rev = 0, r = 0; // To calculate the reverse of the number while (n > 0) { // The remainder will give // the last digit of the number r = n % 10; rev = rev * 10 + r; n = Math.floor(n / 10); } while (rev > 0) { // Extract the first digit // of the reversed number r = rev % 10; // Match it with switch case switch (r) { case 1: document.write("one "); break; case 2: document.write("two "); break; case 3: document.write("three "); break; case 4: document.write("four "); break; case 5: document.write("five "); break; case 6: document.write("six "); break; case 7: document.write("seven "); break; case 8: document.write("eight "); break; case 9: document.write("nine "); break; case 0: document.write("zero "); break; default: document.write("UnValid "); break; } // Divide the number by 10 // to get the next number rev = Math.floor(rev / 10); }}// Driver codelet n = 12345;NumbertoCharacter(n);// This code is contributed by patel2127</script> |
Output:
one two three four five
Time complexity: O(k)
k is the length of the number.
Space complexity: O(1)
