Know How Many Parameters are Received by the Function

Know How Many Parameters are Received by the Function Using arguments Object
This technique lets you know how many parameters are received by the function using �arguments� object. For example:
function add_nums(){
return arguments.length;
}

add_nums(23,11,32,56,89,89,89,44,6); //this return the number 9
This is very useful at the time you need to check the number of parameter in validations or even to create a function with undetermined parameters.
function sum_three_nums( ){
if(arguments.length!=3) throw new Error('received ' + arguments.length + ' parameters and should work with 3');

}

sum_three_nums(23,43); //Return the error message

function sum_num(){
var total = 0;
for(var i=0;i total+=arguments[i];
}
return total;
}

sum_num(2,34,45,56,56);