Understanding the ActionScript Language > About data types > Null
Understanding the ActionScript Language > About data types > Null |
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Null
The null data type has only one value, null. This value means "no value"—that is, a lack of data. The null value can be used in a variety of situations. Here are some examples:
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To indicate that a variable has not yet received a value |
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To indicate that a variable no longer contains a value |
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As the return value of a function, to indicate that no value was available to be returned by the function |
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As a parameter to a function, to indicate that a parameter is being omitted |
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