Given the following method, the output is expected to search an array of $4$ characters for the letter x$.$ If it is found, the location of it is returned.

What is the issue?

public static int checkForValue$($double$[]$ val$)\{$

int location$=0$;

for$($int num $=0$; num $<=3$; num$++)\{$

if$($val$[$num$]==\text{'}$x$\text{'})\{$

location $=$ num $+1$;

break;

$\}$

$\}$

return location;

$\}$

The parameter.

The return statement.

The concatenation.

The loop.