javascript loop and array

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1var colors = ['red', 'green', 'blue'];
2	
3	colors.forEach((color, colorIndex) => {
4     console.log(colorIndex + ". " + color); 
5    });

1var myStringArray = ["hey","World"];
2var arrayLength = myStringArray.length;
3for (var i = 0; i < arrayLength; i++) {
4    console.log(myStringArray[i]);
5    //Do something
6}

1<!DOCTYPE html>
2<html>
3<body>
4
5<h2>JavaScript For Loop</h2>
6
7<p id="demo"></p>
8
9<script>
10const cars = ["BMW", "Volvo", "Saab", "Ford"];
11
12let i = 0;
13let len = cars.length;
14let text = "";
15
16for (; i < len; ) {
17  text += cars[i] + "<br>";
18  i++;
19}
20document.getElementById("demo").innerHTML = text;
21</script>
22
23</body>
24</html>
25

1const myArray = [{x:100}, {x:200}, {x:300}];
2
3const newArray= myArray.map(element => element.x);
4console.log(newArray); // [100, 200, 300]

1var array = ["hello","world"];
2array.forEach(item=>{
3	console.log(item);
4});

1The age is: 25
2

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