Question

Write a program which counts for the number of digits in an integer number being

entered by user using:

a. For loop

b. While loop

c. Do while loop

Answer 1

#include <stdio.h>  
int main()  
{  
   printf("Enter a number : "); 
   int n;  
   int count=0;     
   scanf("%d",&n);  
   while(n>0)  
   {  
       n=n/10;  
       count++;  
   }  
     
   printf("\nThe number of digits in entered number is : %d",count);  
   return 0;  
}