Arguments object in JavaScript Functions

First look at the code

 
 

  
  
functionsayHello(){  
  
  
if(arguments[0]=="bye")  
  
  
return;  
  
  
alert(arguments[0]);  
  
  
} 
 
 

1. Call sayHello ('bye') and return directly without any information

2. Call sayHello ('helloworld') and prompt "HelloWorld"

Arguments also provides an attribute arguments. length, acting on the number of parameters:

 
 

  
  
Funcionargs (){
  
  
Alert (arguments. length );
  
  
}
  
  
Args ('A', 1) // prompt 2
  
  
Args () // prompt 0
  
  
Args (23) // prompt 1
 
 

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