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Used to increment a variable by a specified amount
result += expression
result
Any variable.
expression
Any expression.
Using this operator is exactly the same as specifying:
result = result + expression
The underlying subtype of the expression 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 |
For information on when a run-time error is generated by the += operator, see the Operator Behavior table.
Copyright 2002 Sun Microsystems, Inc. All rights reserved. Legal Notice.