 # JavaScript: Compute the sum of absolute differences of consecutive numbers of a given array of integers

## JavaScript Basic: Exercise-96 with Solution

Write a JavaScript program to compute the sum of absolute differences of consecutive numbers of a given array of integers.

Pictorial Presentation: Sample Solution:

HTML Code:

``````<!DOCTYPE html>
<html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title> Compute the sum of absolute differences of consecutive numbers of a given array of integers</title>
<body>

</body>
</html>
```
```

JavaScript Code:

``````function sum_adjacent_difference(arr) {
var result = 0;
for (var i = 1; i < arr.length; i++) {
result += Math.abs(arr[i] - arr[i - 1]);
}
return result;
}

```
```

Sample Output:

```10
```

Flowchart: ES6 Version:

``````function sum_adjacent_difference(arr) {
let result = 0;
for (let i = 1; i < arr.length; i++) {
result += Math.abs(arr[i] - arr[i - 1]);
}
return result;
}

``````

Live Demo:

See the Pen javascript-basic-exercise-96 by w3resource (@w3resource) on CodePen.

What is the difficulty level of this exercise?

﻿

## JavaScript: Tips of the Day

Classes/function constructors

```class Person {
constructor() {
this.name = 'Owen';
}
}

Person = class AnotherPerson {
constructor() {
this.name = 'Eddie';
}
};

const member = new Person();
console.log(member.name);
```

We can set classes equal to other classes/function constructors. In this case, we set Person equal to AnotherPerson. The name on this constructor is Eddie, so the name property on the new Person instance member is "Eddie".

Ref: https://bit.ly/3jFRBje