Decrement may refer to any of the following:

  1. A decrement is a programming operator that decreases the numerical value of its operand by 1. In Perl, a variable can be decremented by one by adding a – at the end of the variable. In the example below, the value variable is set as five and then decremented in value by one with the $value–; line. The last line prints the variable’s new value, which is four.

my $value = 5; $value–; print “$value\n”;

  1. With the processor ALU (arithmetic logic unit) arithmetic unit, decrement is the operation of subtracting a 1 from a bit.
  • How to create a computer program.

ALU, Increment, Operator, Programming terms