What is the difference between arguments and parameters in javascript?

Question

I know that a parameter is a variable passed to a function and gives value to the argument in the function, but I'm having trouble understanding:

What is the main difference between "arguments" and "parameters" in javascript?

Answer 1

The parameters are the aliases for the values that will be passed to the function. The arguments are the actual values.

var foo = function( a, b, c ) {}; // a, b, and c are the parameters

foo( 1, 2, 3 ); // 1, 2, and 3 are the arguments

Answer 2

When you define a function, the variables that represent the values that will be passed to it for processing are called parameters. For example, the following function definition has one parameter called $number:

function doubleIt($number) {
    return $number *= 2;
}

However, when you use a function, the value you pass to it is called an argument. So, in the following case, $price is passed as the argument to doubleIt():

$price = 50;
$inflated_price = doubleIt($price);  // 100