Perl (Scripting) - Upper case (uc)

In this example, the $foo variable contains "Hello World".

my $foo = "Hello World";


The uc (upper case) operator can be used to update the value to be "HELLO WORLD".

$foo = uc($foo);


In a regular expression, the i operator can be used to ignore case in a comparison. In this example, the comparison operator checks if the $foo variable contains the text "hello", regarless of the case sensitivity of the value in the $foo variable.

if ($foo =~ /hello/i) {
  print "foo contains hello\n";


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