C Program to Count the Number of Digits in a Given Number

In this program, the user is ask to enter the number, then the number of digits the given number have will be displayed on console.

Source Code

#include<stdio.h>
#include<conio.h>

void main()
{
    int num, digit=0;
    //clrscr();
    printf("Enter a number: ");
    scanf("%d", &num);

    while(num!=0)
    {
        digit++;
        num = num / 10;
    }

    printf("No. of digits = %d", digit);
    getch();
}

Output

Enter a number: 42513
No. of digits = 5

Enter a number: 47
No. of digits = 2