Add '+', '+='

The Add operator adds two values together. Add can be used in both variable and constant expressions. Example:

X := Y + 5

Add has an assignment form, +=, that uses the variable to its left as both the first operand and the result destination.

For example:

X += 10       'Short form of X := X + 10 

Here, the value of X is added to 10 and the result is stored back in X. The assignment form of Add may also be used within expressions for intermediate results; see Intermediate Assignments.