7.4.5 += Operator

Used to increment a variable by a specified amount
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 expression determines the behavior of the += operator:
If
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Then
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Both expressions are numeric or Boolean
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Add
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Both expressions are strings
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Concatenate
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One expression is numeric and the other is a string
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Concatenate
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For information on when a run-time error is generated by the += operator, see the Operator Behavior table.
Copyright © 2000 Chili!Soft
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