# Get Maximum and Minimum value from a JavaScript Array

In this tute, we will discuss how to get Maximum and Minimum value from an Array in JavaScript. Before entering into the topic, let’s see a quick recap of arrays.

An **array** is a special variable that can contain more than one value. These elements can be of the same or different data types. Few examples of arrays are,

// Arrays of single type of elements var arr1 = [5, 2, 3]; var arr2 = ['a', '3', 'hola']; var arr3 = [55.3, 10.45]; // Array with multiple types of elements var arr4 = [1, 'abc', 55.99];

## JavaScript code to get Maximum and Minimum of an Array

There are a lot of possible ways to find the maximum and minimum values from an array based on the area used, query constraints, updates, and so on. Let’s see two simple and common methods to get max and min of an array in Javascript in this post.

#### Method 1:

In this method, we’ll make use of the `max()`

and `min()`

methods available in the built-in Math object.

**Syntax:**

Math.max(...array); // Returns maximum element in array Math.min(...array); // Returns minimum element in array

**Code Snippet:**

var arr = [45, 10, 99, 55]; var max = Math.max(...arr); // max = 99 var min = Math.min(...arr); // min = 10

The `Math.min()`

function returns the minimum elements of the array. Similarly, the `Math.max()`

function returns the maximum element of the array.

#### Method 2:

In this method, let’s try to find the min and max elements without using the Math object. The idea is to iterate through all the elements and identify the minimum and maximum elements.

**Algorithm:**

- Firstly, start iterating through all the elements.
- At each index, if the element is greater than the current max, update the current max value with the current element.
- Similarly, if the element is smaller than the current min, update the current min value.
- Finally, return/print the min and max values.

**Pseudocode:**

max = lowest_value min = largest_value For element in array: If element > max then max = element If element < min then min = element

**Code Snippet:**

var arr = [45, 10, 99, 55]; var max = -1e19; // Lower bound var min = +1e19; // Upper bound for(var x in arr) { // Traverse indices if(arr[x] > max) max = arr[x]; // Update max if arr[x] is greater if(arr[x] < min) min = arr[x]; // Update min if arr[x] is smaller }

**Time Complexity:**

The time complexity is **O(n)**. There are n elements in the array and every element is visitedÂ once.

Finally, If you have any queries or doubts on how to get maximum and minimum of an array in JavaScript, simply comment in the comment section provided below.

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