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7.18.3 length Property

Contains the number of arguments a function is defined with.
 

Syntax

functionname.length

functionname
The name of the function.

Remarks

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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