How to Use Math.max and Math.min in JavaScript

Use Math.max() to find the largest number and Math.min() to find the smallest number from a list of values in JavaScript. Pass numbers as arguments or use the spread operator to handle arrays.

Syntax

Math.max(value1, value2, ...) returns the largest number among the arguments.

Math.min(value1, value2, ...) returns the smallest number among the arguments.

You can pass numbers directly or use the spread operator ... to pass an array.

javascript

Math.max(3, 7, 2, 9)
Math.min(3, 7, 2, 9)

const numbers = [3, 7, 2, 9];
Math.max(...numbers)
Math.min(...numbers)

Output

9
2
9
2

Example

This example shows how to find the highest and lowest numbers from a list using both direct arguments and an array with the spread operator.

javascript

const values = [10, 5, 20, 8];

const maxDirect = Math.max(10, 5, 20, 8);
const minDirect = Math.min(10, 5, 20, 8);

const maxFromArray = Math.max(...values);
const minFromArray = Math.min(...values);

console.log('Max using direct args:', maxDirect);
console.log('Min using direct args:', minDirect);
console.log('Max using array:', maxFromArray);
console.log('Min using array:', minFromArray);

Output

Max using direct args: 20
Min using direct args: 5
Max using array: 20
Min using array: 5

Common Pitfalls

Passing an array directly to Math.max() or Math.min() without the spread operator returns NaN because these functions expect separate numbers, not an array.

Also, calling these functions without arguments returns -Infinity for Math.max() and Infinity for Math.min(), which can cause unexpected results.

javascript

const nums = [1, 2, 3];

// Wrong: passing array directly
console.log(Math.max(nums)); // NaN

// Right: using spread operator
console.log(Math.max(...nums)); // 3

// No arguments
console.log(Math.max()); // -Infinity
console.log(Math.min()); // Infinity

Output

NaN
3
-Infinity
Infinity

Quick Reference

Function	Purpose	Example Usage	Returns
Math.max()	Finds the largest number	Math.max(1, 5, 3)	5
Math.min()	Finds the smallest number	Math.min(1, 5, 3)	1
Spread operator	Pass array elements as separate arguments	Math.max(...[1, 5, 3])	5

Key Takeaways

Use Math.max() to get the largest number and Math.min() for the smallest number from arguments.

Use the spread operator (...) to pass an array to Math.max() or Math.min().

Passing an array directly without spreading causes NaN.

Calling Math.max() or Math.min() with no arguments returns -Infinity or Infinity respectively.

These functions only work with numbers passed as separate arguments, not arrays.