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.
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
chop is returned.
See also chomp.