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

Last update on May 30 2022 09:58:37 (UTC/GMT +8 hours)

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>
<head>
  <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>
</head>
<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.

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Next: Write a JavaScript program to find the number which appears most in a given array of integers.

JavaScript: Tips of the Day

How to insert an item into an array at a specific index (JavaScript)?

What you want is the splice function on the native array object.

arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:

var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());

Ref: https://bit.ly/2BXbp04