/*
 * C program to find the length of a string without using the
 * built-in function
 */
#include <stdio.h>

void main()
{
    char string[50];
    int i, length = 0;
    printf("Enter a string \n");
    gets(string);
    /*  keep going through each character of the string till its end */
    for (i = 0; string[i] != '\0'; i++)
        {
            length++;
        }
    printf("The length of a string is the number of characters in it \n");
    printf("So, the length of %s = %d\n", string, length);
}
/*
*OUTPUT:
Enter a string
Sanfoundry
The length of a string is the number of characters in it
So, the length of Sanfoundry = 10
*/