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The Math.max() function returns the largest of zero or more numbers.


Math.max([value1[, value2[, ...]]])


value1, value2, ...

Return value

The largest of the given numbers. If at least one of the arguments cannot be converted to a number, NaN is returned.


Because max() is a static method of Math, you always use it as Math.max(), rather than as a method of a Math object you created (Math is not a constructor).

If no arguments are given, the result is -Infinity.

If at least one of arguments cannot be converted to a number, the result is NaN.


Using Math.max()

Math.max(10, 20);   //  20
Math.max(-10, -20); // -10
Math.max(-10, 20);  //  20

The following function uses Function.prototype.apply() to find the maximum element in a numeric array. getMaxOfArray([1, 2, 3]) is equivalent to Math.max(1, 2, 3), but you can use getMaxOfArray() on programmatically constructed arrays of any size.

function getMaxOfArray(numArray) {
  return Math.max.apply(null, numArray);

Array.reduce() can also be used to get the maximum of an array, by comparing each value.

var arr = [1,2,3];
var max = arr.reduce(function(a, b) {
    return Math.max(a, b);

Or with the new spread operator, getting the maximum of an array becomes a lot easier.

var arr = [1, 2, 3];
var max = Math.max(...arr);


Specification Status Comment
ECMAScript 1st Edition (ECMA-262) Standard Initial definition. Implemented in JavaScript 1.0.
ECMAScript 5.1 (ECMA-262)
The definition of 'Math.max' in that specification.
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'Math.max' in that specification.
ECMAScript Latest Draft (ECMA-262)
The definition of 'Math.max' in that specification.
Living Standard  

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic Support(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)
FeatureAndroidChrome for AndroidEdge mobileFirefox for AndroidIE mobileOpera AndroidiOS Safari
Basic Support(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)(Yes)

See also

Document Tags and Contributors

 Last updated by: fscholz,