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JavaScript - length of array objects
The length property in JavaScript returns the size of the object. Following is the code for the length of string and array objects −
Example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Document</title>
<style>
body {
font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}
.sample,
.result {
font-size: 18px;
font-weight: 500;
color: red;
}
</style>
</head>
<body>
<h1>JavaScript length property</h1>
<div class="sample"></div>
<div style="font-weight: bold; color: black;" class="result"></div>
<button class="Btn">CLICK HERE</button>
<h3>
Click on the above button to find the length of the array
</h3>
<script>
let sampleEle = document.querySelector(".sample");
let resultEle = document.querySelector(".result");
let arr = [1, 2, "A", "B", "D"];
sampleEle.innerHTML = arr;
document.querySelector(".Btn").addEventListener("click", () => {
resultEle.innerHTML += "The array length is = " + arr.length;
});
</script>
</body>
</html>Output
On clicking the ‘CLICK HERE’ button −
Updated on: 11-May-2020
213 Views
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