C Programming language

In this example we are going to find number of digits into a number. We are using while loop to find the number of digits into a given number .We just find modulo of number and reduce the last digit from original number .While modulo of number is greater than zero then increase value of p .Finally when the modulo is zero. Then while loop will end and the value of p is equals to number of digits of that number.

/* Input a number and count its digit */

#include<stdio.h>
#include<conio.h>
void main()
{
	int i,p=0;
	clrscr();
	printf("Enter a number ");
	scanf("%d",&i);
	while(i!=0)
	{
		i=i/10;
		p++;
	}
	printf("Digit is =%d",p);
	getch();
}