how to make arguments quantity to be variable injs code example

Example 1: javascript x number of parameters

function display_numbers(...numbers) {
	colors.forEach(function(x) {
  		console.log(x);
	});
}

// call it like:
display_numbers(1)
display_numbers(1, 2, 3, 4)
display_numbers(1, -1, 9, 0, 2)

Example 2: javascript function variable arguments

function foo() {
  for (var i = 0; i < arguments.length; i++) {
    console.log(arguments[i]);
  }
}

foo(1,2,3);
//1
//2
//3