# += (increment)

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Mathematical   [other Mathematical operators]

9.1.0

+=

This assignment operator is a convenient shorthand for incrementing an attribute. For example, the two following statements are equivalent:

`\$MyNumber += 3;`

`\$MyNumber = \$MyNumber + 3;`

This operator may also be used with Lists and Sets, and += may be used to append strings:

`\$MyString += "!"`
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