strlen

The strlen() function returns the length of the given string. It doesn't count null character '\0'.

Syntax :

strlen(string_name)

Example :

    #include <stdio.h>

    int main(void)
    {
    char ch[20]={'h','e','l','l','o','\0'};
    printf("Length of string is: %d",strlen(ch));
    return 0;
    }

Output :

Length of string is: 5