Number Manipulation

Mathematical Assignment Operators

The following assignment operators have been added:

• +=, the addition assignment operator, adds the value of the right operand to a variable and assigns the result to the variable.
• -=, the subtraction assignment operator, subtracts the value of the right operand from a variable and assigns the result to the variable.
• *=, the multiplication assignment operator, multiplies the variable by the right operand and assigns the result to the variable.
• /= and \=, the division assignment operators, divide the variable by the right operand and assign the result to the variable.

    Dim i as Integer
    i += 5
    Print i     ' Prints 5
    i -= 3
    Print i     ' Prints 2
    i *= 4
    Print i     ' Prints 8
    i /= 2
    Print i     ' Prints 4
    i \= 2
    Print i     ' Prints 2

Note

The assignment operators cannot be combined with another function, e.g. Print i += 2 will not compile.

Increment and Decrement Operators

In LotusScript, incrementing a numeric value is done using code such as i = i + 1. VoltScript adds the increment operator (++) and decrement operator (--). These can both be used prefix and postfix.

If used postfix (i++) the variable is incremented after it is used. If used prefix (++i) the variable is incremented before it is used.

Dim i as Integer
Print ++i       ' Prints 1
Print i++       ' Prints 1 again, and after printing increments i to 2
Print i         ' Prints 2
Print --i       ' Prints 1
Print i--       ' Prints 1 again, and after printing decrements i to 0
Print i         ' Prints 0

Warning

+= can only be used for manipulation of numeric values. It cannot be used for string concatenation.