JavaScript: Find the highest value in an array

JavaScript Math: Exercise-6 with Solution

Write a JavaScript function to find the highest value in an array.

Test Data :
console.log(max([12,34,56,1]));
console.log(max([-12,-34,0,-56,-1]));
56
0

Visual Presentation:

Sample Solution:

JavaScript Code:

// Define a function named max that takes an input array.
function max(input) {
    // Check if the input is an array, if not, return false.
    if (toString.call(input) !== "[object Array]")
        return false;
    // Return the maximum value from the input array using Math.max.apply.
    return Math.max.apply(null, input);
}

// Output the maximum value from the array [12, 34, 56, 1] to the console.
console.log(max([12, 34, 56, 1]));
// Output the maximum value from the array [-12, -34, 0, -56, -1] to the console.
console.log(max([-12, -34, 0, -56, -1]));

Output:

56
0

Flowchart:

Live Demo:

See the Pen javascript-math-exercise-6 by w3resource (@w3resource) on CodePen.

Improve this sample solution and post your code through Disqus.

Previous: Write a JavaScript function to format a number up to specified decimal places.
Next: Write a JavaScript function to find the lowest value in an array.