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Adds the value of an expression to the value of a variable and assigns the result to the variable.
Syntax
result += expression
Arguments
result
Any variable.expression
Any expression.
Remarks
Using this operator is exactly the same as specifying:
result = result + expression
The underlying subtype of the expressions determines the behavior of the += operator.
If |
Then |
|---|---|
Both expressions are numeric or Boolean |
Add |
Both expressions are strings |
Concatenate |
One expression is numeric and the other is a string |
Concatenate |
Requirements
See Also
Addition Operator (+) (Windows Scripting - JScript)
Operator Precedence (Windows Scripting - JScript)
Operator Summary (Windows Scripting - JScript)