C, C++ Program to Count Number of Digits in a Number

C, C++ Program to Count Number of Digits in a Number

Write a C, C++ program to count number of digits in a number. Given a positive input number, Our program will count the number of digits present in a number. Suppose a user has entered a number 4567, So the total digits in a number is 4.

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C Program to Count Number of Digits of a Number

#include <stdio.h>

int main() {
 
   int num;
   int count=0;
 
   printf("Enter a number \n");
   scanf("%d", &num);

   /* If a number is greater than zero. */
       
   while(num > 0) {

      /* Reduce the number is every iteration. */

      num=num/10;

     /* Increment the count. */

     count++;
  }
 
  printf("Number of digits in a number is %d",count);
 
  return 0;
}

Output:

Enter a number - 4567

Number of digits in a number is - 4

C++ Program to Count Number of Digits in a Number

#include<iostream>
using namespace std;

int main() {
    
    int num, count = 0;
    
    // Input number
    cout << "Enter a number \n";
    cin  >> num;
    
    // If number is greater than zero
    while (num > 0) {
        
        //Reduce number in each iteration
        num = num / 10;
        
        //Count number of digits
        count++;
    }
    
    cout << "Number of digits in a number is " << count;
    
    return 0;
}

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