--

Decrement a number or column by one.

Example:

  my $number=5;
  $number--;
  my $col=Close-5;
  $col--;

Related functions:

- , + , * , / , % , ** , += , -= , *= , /= , %= , **= , ++ , <=> , >= , > , < , <= , == , != , & , | , ~ , << , >> , If