Perl Examples by Ray Yao

Author:Ray Yao [Yao, Ray]
Language: eng
Format: azw3, epub, mobi
Published: 2021-06-30T00:00:00+00:00

Output:

$x = 0 , $y = 1

$x & $y = 0

$x | $y = 1

$x ^ $y = 1

14. Pass Hash Parameters

Example:

# define a method

sub func{

my (%hash) = @_;

foreach my $key ( keys %hash ){

my $value = $hash{$key};

print "$key : $value
";

}

}

%hash = ('title' => 'Java', 'hours' => 8);

# pass a hash parameter

func(%hash);

Output:

title : Java

hours : 8

15. Global & Local

Example:

# global variable

$str = "Hi, anybody!";

# define a function

sub func{

my $str; # my define a private variable

$str = "Hi, my friend!";

print "A string inside the function:$str
";

}

# call the function

func();

print "A string outside the function:$str
";

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