chop VARIABLE
chop LIST
chop

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.

Note that chop() returns the last character. To return all but the last character, use substr($string, 0, -1).