ES6 function to add number in argument code example

Example 1: javascript multiply arguments

const mul = (...args) => args.reduce((a, b) => a * b);

// Example
mul(1, 2, 3, 4);    // 24

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