JavaScript: Compute the sum and product of an array of integers

Last update on May 30 2022 10:08:41 (UTC/GMT +8 hours)

JavaScript Array: Exercise-12 with Solution

Write a JavaScript program to compute the sum and product of an array of integers.

Pictorial Presentation:

JavaScript: Compute the sum and product of an array of integers

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Compute the sum and product of an array of integers</title>
</head>
<body>
</body>
</html>

JavaScript Code:

var array = [1, 2, 3, 4, 5, 6],
    s = 0,
    p = 1,
    i;
for (i = 0; i < array.length; i += 1) 
   {
    s += array[i];
    p *= array[i];
    }
console.log('Sum : '+s + ' Product :  ' +p);

Sample Output:

Sum : 21 Product :  720

Flowchart:

ES6 Version:

const array = [1, 2, 3, 4, 5, 6];
let s = 0;
let p = 1;
let i;
for (i = 0; i < array.length; i += 1) 
   {
    s += array[i];
    p *= array[i];
    }
console.log(`Sum : ${s} Product :  ${p}`);

Live Demo:

See the Pen avaScript - sum and product of an array of integers- array-ex- 12 by w3resource (@w3resource) on CodePen.

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Next: Write a JavaScript program to add items in an blank array and display the items.

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JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = [];
arr[0] = "Jani";
arr[1] = "Hege";
arr[2] = "Stale";
arr[3] = "Kai Jim";
arr[4] = "Borge";

console.log(arr.join());
arr.splice(2, 0, "Lene");
console.log(arr.join());

Ref: https://bit.ly/2BXbp04