addition assignment
Summary
Adds the value of an expression to the value of a variable and assigns the result to the variable.
Syntax
result += expression
- result
- Any variable.
- expression
- Any expression.
Examples
var x = 5;
x += 2;
// result: x = 7
Remarks
Using this operator is exactly the same as specifying: result = result + expression.
The types of the two expressions determine 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 |
See also
Other articles
Attributions
Microsoft Developer Network: Article