#include <stdio.h>
#include<conio.h>
void main()
{
int n, count=0;
clrscr();
printf("Enter Number\n ");
scanf("%d", &n);
while (n != 0)
{
n = n/10;
++count;
}
printf("Number of digits: %d", count);
getch();
}
Output
Enter Number: 654896
Number of digits: 6
