# JavaScript: Find the number of sorted pairs formed by its elements of a given array of integers such that one element in the pair is divisible by the other one

## JavaScript Basic: Exercise-107 with Solution

Write a JavaScript program to find the number of sorted pairs formed by arrays of integers. This is such that one element in the pair is divisible by the other one.

For example - The output of [1, 3, 2] ->2 - (1,3), (1,2).
The output of [2, 4, 6] -> 2 - (2,4), (2,6)
The output of [2, 4, 16] -> 3 - (2,4), (2,16), (4,16)

Sample Solution:

HTML Code:

``````<!DOCTYPE html>
<html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title> Find the number of sorted pairs formed by its elements of a given array of integers such that one element in the pair is divisible by the other one</title>
<body>

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

JavaScript Code:

``````function arr_pairs(arr) {
var result = 0;
for (var i = 0; i < arr.length; i++)
{
for (var j = i + 1; j < arr.length; j++)
{
if (arr[i] % arr[j] === 0 || arr[j] % arr[i] === 0)
{
result++;
}
}
}
return result;
}
console.log(arr_pairs([1,2,3]))
console.log(arr_pairs([2,4,6]))
console.log(arr_pairs([2,4,16]))
``````

Sample Output:

```2
2
3
```

Flowchart: ES6 Version:

``````function arr_pairs(arr) {
let result = 0;
for (let i = 0; i < arr.length; i++)
{
for (let j = i + 1; j < arr.length; j++)
{
if (arr[i] % arr[j] === 0 || arr[j] % arr[i] === 0)
{
result++;
}
}
}
return result;
}
console.log(arr_pairs([1,2,3]))
console.log(arr_pairs([2,4,6]))
console.log(arr_pairs([2,4,16]))
``````

Live Demo:

See the Pen javascript-basic-exercise-107 by w3resource (@w3resource) on CodePen.

What is the difficulty level of this exercise?

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## JavaScript: Tips of the Day

Randomizes the order of the values of an array, returning a new array

Example:

```const tips_shuffle = ([...arr]) => {
let x = arr.length;
while (x) {
const i = Math.floor(Math.random() * x--);
[arr[x], arr[i]] = [arr[i], arr[x]];
}
return arr;
};
const foo = [2, 4, 6];
console.log(tips_shuffle(foo));
```

Output:

```[4, 2, 6]
```

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