JavaScript: Find the sum of squares of a numeric vector

Last update on May 30 2022 10:06:54 (UTC/GMT +8 hours)

JavaScript Array: Exercise-11 with Solution

Write a JavaScript program to find the sum of squares of a numeric vector.

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Sum of squares of a numeric vector</title>
</head>
<body>
</body>
</html>

JavaScript Code:

function sum_sq(array) {
  var sum = 0, 
      i = array.length;
  while (i--) 
   sum += Math.pow(array[i], 2);
  return sum;
}
 
console.log(sum_sq([0,1,2,3,4]));

Sample Output:

Flowchart:

ES6 Version:

function sum_sq(array) {
  var sum = 0,
      i = array.length;
  while (i--) {
    sum += Math.pow(array[i], 2);
  }return sum;
}

console.log(sum_sq([0, 1, 2, 3, 4]));

Live Demo:

See the Pen JavaScript - Find the sum of squares of a numeric vector- array-ex- 11 by w3resource (@w3resource) on CodePen.

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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