While performing main$(),$ what is output

public static int myMethod$($int val$)\{$

$$ int mysteryVal;

$$ mysteryVal $=$ val $*$ val;

$$ return mysteryVal;

$\}$

public static void main$($String args$[])\{$

$$ int result;

$$ result $=$ myMethod$(6)$;

$$ System.out.println$($result$)$;

$\}$

Group of answer choices

$0$

null

$36$

$6$