Compare values - examples

Perl: Compare values - examples

---

Expression	Value
"12.0" == 12	TRUE
"12.0" eq 12	FALSE
2 < 3	TRUE
2 lt 3	TRUE
12 > 3	TRUE
12 gt 3	FALSE !
"foo" == ""	TRUE ! (Warning)
"foo" eq ""	FALSE
"foo" == "bar"	TRUE ! (Warning)
"foo" eq "bar"	FALSE

When reading from STDIN you can always expect a string

examples/scalars/is_empty_string.pl

#!/usr/bin/perl
use strict;
use warnings;

my $input = <STDIN>;
chomp $input;
 

if ($input == "") {     # wrong! use eq
    # empty string 
} 

--Thanks: Edu Maven