The Chop(s) command returns a copy of input string s with the last character removed, if the string is nonempty. As a special case, the empty string is returned unchanged.

Note: This function is similar to the Perl function of the same name.

Compare this procedure with the other perl-esque routine StringTools[Chomp], which removes only line ending characters.

All of the StringTools package commands treat strings as (null-terminated) sequences of $8$-bit (ASCII) characters.  Thus, there is no support for multibyte character encodings, such as unicode encodings.

$\mathrm{with}\left(\mathrm{StringTools}\right)\:$

$\mathrm{Chop}\left(''abc''\right)$

$''ab''$

$\mathrm{Chop}\left(''This\; is\; a\; test.\backslash n''\right)$

$''This\; is\; a\; test.''$

$\mathrm{Chop}\left(''''\right)$