chop(LIST)

chop(VARIABLE)

chop VARIABLE

Chops off the last character of a string and returns
the character chopped. It's used primarily to
remove the newline from the end of an input record,
but is much more efficient than s/\n// because it
neither scans nor copies the string. If VARIABLE is
omitted, chops $_. Example:

while (<>) {
chop; # avoid \n on last field
@array = split(/:/);
...
}

You can actually chop anything that's an lvalue,
including an assignment:

chop($cwd = `pwd`);
chop($answer = <STDIN>);

If you chop a list, each element is chopped. Only
the value of the last chop is returned.