 # JavaScript: Compute the absolute difference between a specified number and 19

## JavaScript Basic: Exercise-17 with Solution

Write a JavaScript program to compute the absolute difference between a specified number and 19. Returns triple their absolute difference if the specified number is greater than 19.

Sample Solution:

HTML Code:

``````<!DOCTYPE html>
<html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JavaScript program to compute the absolute difference between a specified number and 19.  Returns triple their absolute difference if the specified number is greater than 19.</title>
<body>

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

JavaScript Code:

``````function diff_num(n) {
if (n <= 19) {
return (19 - n);
}
else
{
return (n - 19) * 3;
}
}

console.log(diff_num(12));
console.log(diff_num(19));
console.log(diff_num(22));
```
```

Sample Output:

```7
0
9
```

Flowchart: ES6 Version:

``````function diff_num(n) {
if (n <= 19) {
return (19 - n);
}
else
{
return (n - 19) * 3;
}
}

console.log(diff_num(12));
console.log(diff_num(19));
console.log(diff_num(22));
``````

Live Demo:

See the Pen JavaScript: Absolute difference- basic-ex-17 by w3resource (@w3resource) on CodePen.

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﻿

## 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