Addition Operator (+) (VBScript)
Sums two numbers.
result = expression1 + expression2
Arguments
result
Any numeric variable.expression1
Any expression.expression2
Any expression.
Remarks
Although you can also use the + operator to concatenate two character strings, you should use the & operator for concatenation to eliminate ambiguity. When you use the + operator, you may not be able to determine whether addition or string concatenation will occur.
The type of the expressions determines the behavior of the + operator in the following way:
If |
Then |
|---|---|
Both expressions are numeric |
Add |
Both expressions are strings |
Concatenate |
One expression is numeric and the other is a string |
Error: type mismatch |
If one or both expressions are Null expressions, result is Null. If both expressions are Empty, result is an Integer subtype. However, if only one expression is Empty, the other expression is returned unchanged as result.
Requirements
See Also
Reference
Subtraction Operator (-) (VBScript)
Operator Precedence (VBScript)