/*The rest parameter syntax allows a function to accept an indefinite

number of arguments as an array, */

​

function getFirstElementOfArray(...args){

  return args[1]

}

​

getFirstElementOfArray("shirshak","Sabtech","Javascript")// return shirshak

let func = function(...args) {

    console.log(args);

}

​

func(3); // [3]

func(4, 5, 6); // [4, 5, 6]

/*

That allows a function to accept an indefinite number of arguments as an array

*/

function fun(...input){

    let sum = 0;

    for(let i of input){

        sum+=i;

    }

    return sum;

}

console.log(fun(1,2)); //3

console.log(fun(1,2,3)); //6

console.log(fun(1,2,3,4,5)); //15 

// With rest parameters, you can define a function to store multiple arguments in a single array

​

function sayHello(message, ...names){

  names.forEach(name => console.log(`${message} ${name}`));

}

​

sayHello('Hello', "John", "Smith", "Doe");

​

/*

output:

​

Hello John

​

Hello Smith

​

Hello Doe 

​

*/

​

// The ... is what makes names a rest parameter.

function show(a, b, ...args) {

  console.log(a); // one

  console.log(b); // two

  console.log(args); // ["three", "four", "five", "six"]

}

​

show('one', 'two', 'three', 'four', 'five', 'six')