Demonstration of bitwise and logical operators

Conditionals and Loops example from a Well House Consultants training course
More on Conditionals and Loops [link]

This example is described in the following article(s):
• AND and OR operators - what is the difference between logical and bitwise varieties? - [link]

Source code: bitwise Module: P204

# Demonstration of bitwise operators ...

# Use with care. Great for packed binary, great for graphics
# usually wrong for other uses

$first = 23;
$second = 67;
# show numbers in binary
printf ("Incoming values ... %016b %016b\n",$first,$second);

# BITWISE

$ored = $first | $second;
$anded = $first & $second;

print "That's BITWISE or: $ored and and: $anded\n";

# LOGICAL

$ored = $first || $second;
$anded = $first && $second;

print "That's LOGICAL or: $ored and and: $anded\n";

# LOGICAL - keywords and / or

$ored = $first or $second;
$anded = $first and $second;
print "That's KEYWORD or: $ored and and: $anded\n";
# Need brackets in different ways
$ored = ($first or $second);
$anded = ($first and $second);
print "That's KEYWORD or: $ored and and: $anded\n";

# Shifting

$bigger = $first << 3;
$smaller = $second >> 3;
print "Shifted, you get $bigger and $smaller\n";

# Exclusive or and bitwise not

$xor = $first ^ $second;
$neg = ~ $first;
print "Exclusive or and bitwise not: $xor and $neg\n";

__END__

munchkin:pl grahamellis$ perl bitwise
Incoming values ... 0000000000010111 0000000001000011
That's BITWISE or: 87 and and: 3
That's LOGICAL or: 23 and and: 67
That's KEYWORD or: 23 and and: 23
That's KEYWORD or: 23 and and: 67
Shifted, you get 184 and 8
Exclusive or and bitwise not: 84 and 18446744073709551592
munchkin:pl grahamellis$

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