hex EXPR returns the number of which EXRP is a hexadecimal representation with or without leading 0x or x. #!/usr/bin/perl
use warnings;
use strict;
print(hex('10') + hex('0x1A')); # 42
#!/usr/bin/perl
use warnings;
use strict;
my $x = '48656c6c6f20576f726c6421';
for (my $i = 0; $i<length($x); $i+=2) {
my $a = chr(hex(substr($x, $i, 2)));
print $a;
}
print "\n";