Write a program to find the string length without using strlen 0 function

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Q. Write a program to find the string length without using strlen 0 function.
Ans. /* C Program to find the length of a String without
 *  using any standard library function 
 */
#include <stdio.h>
int main()
{
    /* Here we are taking a char array of size 
     * 100 which means this array can hold a string 
     * of 100 chars. You can change this as per requirement
     */
    char str[100],i;
    printf("Enter a string: \n");
    scanf("%s",str);
 
    // '\0' represents end of String
    for(i=0; str[i]!='\0'; ++i);
       printf("\nLength of input string: %d",i);
    
    return 0;
}
Output:


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