Increase the value of the variable Name.
The value is increased by the integer Value.
If the variable does not contain a numeric value (e.g. 3) this action will end in error.
If the variable does not exist, it will first be created with a value of 0.
If a Wrap Around is not zero, then when the final result is equal to or greater than the Wrap Around value, it will wrap back to 0 e.g. with Wrap Around 5, 2 + 4 = 1.
See the section on Conditions and Loops in the Userguide for more information.
Use action Variable Set for non-integer addition.