sub myfunction_long
{
    my $z = $_[0] + $_[1]; # add the first 2 parameters and assign result to $z
    return $z;
}

sub myfunction_medium
{
    my $z = $_[0] + $_[1]; # add the first 2 parameters and assign result to $z
} # value of $z implicitly returned

sub myfunction_short
{
    $_[0] + $_[1]; # add the first 2 parameters
} # result of expression implicitly returned

print myfunction_long(1, 2);   # prints 3
print myfunction_medium(1, 2); # prints 3
print myfunction_short(1, 2);  # prints 3

##</code><code>##

int z = 0;
void myroutine(int x, y) // "void" tells the compiler that no value is returned
{
    z = x + y; // add the values of the 2 defined parameters and assign the result to the global z
}

int myfunction(int x, y) // "int" tells the compiler that an integer value is returned
{
    return(x + y); // add the values of the 2 defined parameters then return the result
}