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How to reduce arrays in JavaScript?
Following is the code to reduce arrays in JavaScript −
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;
}
.result,
.sample {
font-size: 18px;
font-weight: 500;
color: red;
}
.result {
color: blueviolet;
}
button {
padding: 8px;
}
</style>
</head>
<body>
<h1>Reduce arrays javascript</h1>
<div><pre class="sample">[1,3,5,6,9,22,15]</pre></div>
<div class="result"></div>
<button class="Btn">Sum</button>
<h3>Click on the above button to sum the elements of the array</h3>
<script>
let resEle = document.querySelector(".result");
let BtnEle = document.querySelector(".Btn");
let sampleEle = document.querySelector(".sample");
let arr = [1, 3, 5, 6, 9, 22, 15];
sampleEle.innerHTML = arr;
BtnEle.addEventListener("click", () => {
resEle.innerHTML =
"Sum = " +
arr.reduce((sum, prev) => {
return sum + prev;
});
});
</script>
</body>
</html>Output
On clicking the ‘Sum’ button −
Updated on: 17-Jul-2020
78 Views
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