# 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 numerical vector.

**Sample Solution:**

**JavaScript Code:**

```
// Function to calculate the sum of squares of elements in an array
function sum_sq(array) {
var sum = 0, // Initialize a variable to store the sum of squares
i = array.length; // Initialize a variable with the length of the array
// Iterate through the array in reverse order
while (i--)
// Add the square of the current element to the sum
sum += Math.pow(array[i], 2);
// Return the calculated sum of squares
return sum;
}
// Output the result of the function with a sample array
console.log(sum_sq([0, 1, 2, 3, 4]));
```

Output:

30

**Flowchart:**

**ES6 Version:**

```
// Function to calculate the sum of squares of elements in an array
const sum_sq = (array) => {
// Initialize a variable to store the sum of squares
let sum = 0;
// Iterate through the array in reverse order using forEach
array.forEach((element) => {
// Add the square of the current element to the sum
sum += Math.pow(element, 2);
});
// Return the calculated sum of squares
return sum;
};
// Output the result of the function with a sample array
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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