Write A Program to find length of a string with out using string handling functions

#include<stdio.h>

#include<conio.h>

int len ( char s [ ]);

void main ( )

{

char s [20];

int l;

clrscr();

printf (“enter a string”);

gets ( s);

l = len ( s);

printf ( “\n length is %d”,l);

getch();

}

int len ( char s[])

{

int c = o, i;

for ( i =0; s[i]!='\0'; i++)

{

  c++;

}

return ( c);

}