 # JavaScript: Find the maximum difference among all possible pairs of a given array of integers

## JavaScript Basic: Exercise-93 with Solution

Write a JavaScript program to find the maximum difference among all possible pairs of a given array of integers.

Sample Solution:

HTML Code:

``````<!DOCTYPE html>
<html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Find the maximum difference among all possible pairs of a given array of integers.</title>
<body>

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

JavaScript Code:

``````function array_max_diff(arr) {

var max_result = 0;

for(var i=0;i<arr.length;i++)
{
for(var k=0; k!=i && k<arr.length; k++)
{
var diff = Math.abs(arr[i]-arr[k]);
max_result = Math.max(max_result, diff);
}
}
return max_result;
}
console.log(array_max_diff([1, 2, 3, 8, 9]))
console.log(array_max_diff([1, 2, 3, 18, 9]))
console.log(array_max_diff([13, 2, 3, 8, 9]))
```
```

Sample Output:

```8
17
11
```

Flowchart: ES6 Version:

``````function array_max_diff(arr) {

let max_result = 0;

for(let i=0;i<arr.length;i++)
{
for(let k=0; k!=i && k<arr.length; k++)
{
const diff = Math.abs(arr[i]-arr[k]);
max_result = Math.max(max_result, diff);
}
}
return max_result;
}
console.log(array_max_diff([1, 2, 3, 8, 9]))
console.log(array_max_diff([1, 2, 3, 18, 9]))
console.log(array_max_diff([13, 2, 3, 8, 9]))
``````

Live Demo:

See the Pen javascript-basic-exercise-93 by w3resource (@w3resource) on CodePen.

What is the difficulty level of this exercise?

﻿

## JavaScript: Tips of the Day

Parameter's value

```function getItems(fruitList, ...args, favoriteFruit) {
return [...fruitList, ...args, favoriteFruit]
}

getItems(["banana", "apple"], "pear", "orange")
```

...args is a rest parameter. The rest parameter's value is an array containing all remaining arguments, and can only be the last parameter! In this example, the rest parameter was the second parameter. This is not possible, and will throw a syntax error.

```function getItems(fruitList, favoriteFruit, ...args) {
return [...fruitList, ...args, favoriteFruit];
}

getItems(['banana', 'apple'], 'pear', 'orange');```
The above example works. This returns the array [ 'banana', 'apple', 'orange', 'pear' ].

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