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

JavaScript Basic: Exercise-93 with Solution

Find Max Difference Among All Pairs in Array

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

Sample Solution:

JavaScript Code:

// Function to find the maximum difference between any two elements in an array
function array_max_diff(arr) {
    var max_result = 0;   // Initialize the variable to store the maximum difference

    // Iterate through the array elements
    for(var i = 0; i < arr.length; i++) {
        // Iterate through other elements in the array
        for(var k = 0; k !== i && k < arr.length; k++) {
            var diff = Math.abs(arr[i] - arr[k]);    // Calculate the absolute difference
            max_result = Math.max(max_result, diff); // Update the maximum difference
        }
    }
    
    return max_result;   // Return the final maximum difference
}

// Example usage
console.log(array_max_diff([1, 2, 3, 8, 9]));   // 8
console.log(array_max_diff([1, 2, 3, 18, 9]));  // 17
console.log(array_max_diff([13, 2, 3, 8, 9]));  // 11 

Output:

8
17
11

Live Demo:

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

Flowchart:

ES6 Version:

// Function to find the maximum difference between elements in an array
const array_max_diff = (arr) => {
    let max_result = 0;  // Initialize the maximum difference variable

    // Iterate through the array to calculate the differences between elements
    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]);  // Calculate the absolute difference
            max_result = Math.max(max_result, diff);  // Update the maximum difference
        }
    }

    return max_result;  // Return the final maximum difference
};

// Example usage
console.log(array_max_diff([1, 2, 3, 8, 9]));   // 8
console.log(array_max_diff([1, 2, 3, 18, 9]));  // 17
console.log(array_max_diff([13, 2, 3, 8, 9]));  // 11

For more Practice: Solve these Related Problems:

• Write a JavaScript program that finds the maximum difference among all possible pairs in an array by computing the difference between the minimum and maximum values.
• Write a JavaScript function that iterates over an array only once to determine the overall maximum and minimum, then calculates their difference.
• Write a JavaScript program that efficiently computes the maximum absolute difference between any two elements in an array without nested loops.

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