Add may refer to any of the following:
2. Alternatively referred to as addition, add is a math operation that takes two or more different numbers and outputs their total value. An example of addition is 10 + 4 = 14. On a computer, you can add numbers using a calculator or spreadsheet program and use the addition symbol (+).
The computer processor ALU (arithmetic logic unit) performs the add operation.
In many programming languages, the addition operator ( += ) can be used as a way to add to a previous value. For example, in the Perl code below, the $example variable is first set to a value of "2". The next line uses the addition operator to add "2" to the variable.
$example = 2; $example += 2; print "Total = $example";
When the script above is executed, the computer would print out "Total = 4" to the screen.
3. Add is an online gaming term to describe aggro.