Chops off the last character of a string and returns the character
chopped. It is much more efficient than s/.$//s because it neither
scans nor copies the string. If VARIABLE is omitted, chops
$_ .
If VARIABLE is a hash, it chops the hash's values, but not its keys,
resetting the each iterator in the process.
You can actually chop anything that's an lvalue, including an assignment.
If you chop a list, each element is chopped. Only the value of the last chop is returned.
Note that chop returns the last character. To
return all but the last character, use substr($string, 0, -1)
.
See also chomp.