The Math.max function can accept any arbitrary number of arguments:

Syntax:

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

Usage:

var max = Math.max(num1, num2, num3);

For example:

console.log(Math.max(1,2,3,4,5,6)); //  6

You could even use it to get the maximum value of an array of numbers with the help of apply:

function maxOfArray(array) {

  return Math.max.apply(Math, array);

}





let array = [1,2,3,4,5,6];

console.log(maxOfArray(array)); // 6

If you can target ES6 (ES2015), you can also use the spread operator:

let array = [1,2,3,4,5,6];

let max = Math.max(...array);

console.log(max); // 6