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JavaScript: Find the sum of squares of a numeric vector

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:

30

Flowchart:

Flowchart: JavaScript: Display the colors entered in an array by a specific format

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

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JavaScript: Tips of the Day

Creates an object from the given key-value pairs

Example:

const tips_objectFromPairs = arr => arr.reduce((a, [key, val]) => ((a[key] = val), a), {});
console.log(tips_objectFromPairs([['x', 2], ['y', 4]])); 

Output:

[object Object] {
  x: 2,
  y: 4
}