please explain your codes too

/* * In C characters are are terminated by the null character ('\0') * given a pointer to the start of the string return the length of this string. * (The null character is not counted as part of the string length.) * * ALLOWED: * Pointer operators: *, & Binary integer operators: -, +, *, ==, !=, Unary integer operators: ! Shorthand operators based on the above: ex. >, ^, /, % Unary integer operators: ~, */ int stringLength(char * s) { // Your code here return 2; }