.map function

const array1 = [1, 4, 9, 16];

// pass a function to map
const map1 = array1.map(x => x * 2);

console.log(map1);
// expected output: Array [2, 8, 18, 32]

array.map((item) => {
  return item * 2
} // an example that will map through a a list of items and return a new array with the item multiplied by 2

const array1 = [1, 4, 9, 16];

// pass a function to map
const map1 = array1.map(x => x * 2);

console.log(map1);
// expected output: Array [2, 8, 18, 32]

const array = [2, 5, 9];
let squares = array.map((num) => num * num);

console.log(array); // [2, 5, 9]
console.log(squares); // [4, 25, 81]

  var numbers = [4, 9, 16, 25];
var x = numbers.map(Math.sqrt)

  document.getElementById("demo").innerHTML = x; 

const array1 = [1, 4, 9, 16];

var map1 = array1.map(x => x * 2);
var map2 = array1.map( function( x, i ) {
  	console.log(x, i);
  	// x = 1 , 4 , 9 ,16 i = 0 , 1 , 2 , 3
    return x
} ); 
console.log(map1);
// expected output: Array [2, 8, 18, 32]

var yourArray= yourArray.map(Number);