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Microsoft® JScript™
length Property (Function)
 Language Reference 
Version 2 

See Also                  Applies To

Contains the number of arguments a function is defined with.

The functionname argument is required and is the name of the function in question.

The length property of a function is initialized by the scripting engine to the number of arguments in the function's definition when an instance of the function is created.

What happens when a function is called with a number of arguments different from the value of its length property depends on the function.

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