Java script array
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This document discusses JavaScript arrays. It explains that JavaScript arrays allow storing multiple values in a single variable. There are two ways to declare an array: using array literal syntax (var name = [item1, item2]) or the new keyword (var name = new Array(item1, item2)). The document also demonstrates how to access array elements by index, change array element values, loop through arrays, and output the full array.
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![JavaScript Arrays
JavaScript arrays are used to store multiple values in a
single variable.
Declaration of an Array
There are basically two ways to declare an array.
Example:
var House = [ ]; // method 1
var House = new array(); // method 2](https://image.slidesharecdn.com/javascriptarray-200407013707/85/Java-script-array-2-320.jpg)
![Example
<html>
<body>
<h2>JavaScript Arrays</h2>
<p id="demo"></p>
<script>
var cars = [“Maruti", “Hundai", "BMW"];
document.getElementById("demo").innerHTML = cars;
</script>
</body>
</html>
Output: JavaScript Arrays
Maruti,Hundai,BMW](https://image.slidesharecdn.com/javascriptarray-200407013707/85/Java-script-array-3-320.jpg)
![Creating an Array
Using an array literal is the easiest way to create a
JavaScript Array.
Syntax:
var array_name = [item1, item2, ...];](https://image.slidesharecdn.com/javascriptarray-200407013707/85/Java-script-array-4-320.jpg)
![Access the Elements of an Array
<script>
var cars = [“Maruti", “Hundai", "BMW"];
document.getElementById("demo").innerHTML =
cars[0];
</script>
Output: Maruti](https://image.slidesharecdn.com/javascriptarray-200407013707/85/Java-script-array-6-320.jpg)
![Changing an Array Element
<script>
var l = [“xy", “yz", “zx"];
l[0] = “ab";
document.getElementById("demo").innerHTML = I;
Output: ab, yz, zx](https://image.slidesharecdn.com/javascriptarray-200407013707/85/Java-script-array-7-320.jpg)
![Looping Array Elements
<script>
var fruits, text, fLen, i;
fruits = ["Banana", "Orange", "Apple", "Mango"];
fLen = fruits.length;
text = "<ul>";
for (i = 0; i < fLen; i++) {
text += "<li>" + fruits[i] + "</li>";
}
text += "</ul>";
document.getElementById("demo").innerHTML = text;
</script>
Output:
Banana
Orange
Apple
Mango](https://image.slidesharecdn.com/javascriptarray-200407013707/85/Java-script-array-8-320.jpg)
![Access the Full Array
<script>
var shapes = [“circle", “triangle", “square"];
document.getElementById("demo").innerHTML =
cars;
</script>
Output: circle, triangle, square](https://image.slidesharecdn.com/javascriptarray-200407013707/85/Java-script-array-9-320.jpg)
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Inheritance in java
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- 3. Example <html> <body> <h2>JavaScript Arrays</h2> <p id="demo"></p> <script> var cars = [“Maruti", “Hundai", "BMW"]; document.getElementById("demo").innerHTML = cars; </script> </body> </html> Output: JavaScript Arrays Maruti,Hundai,BMW
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- 5. Using the JavaScript Keyword new The following example also creates an Array, and assigns values to it: <script> var cars = new Array(“Maruti", “Hundai", "BMW"); document.getElementById("demo").innerHTML = cars; </script>
- 6. Access the Elements of an Array <script> var cars = [“Maruti", “Hundai", "BMW"]; document.getElementById("demo").innerHTML = cars[0]; </script> Output: Maruti
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- 8. Looping Array Elements <script> var fruits, text, fLen, i; fruits = ["Banana", "Orange", "Apple", "Mango"]; fLen = fruits.length; text = "<ul>"; for (i = 0; i < fLen; i++) { text += "<li>" + fruits[i] + "</li>"; } text += "</ul>"; document.getElementById("demo").innerHTML = text; </script> Output: Banana Orange Apple Mango
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