how to find max in a part of array javascriopt code example

Example 1: Find the maximum number of an array js

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

Example 2: Find the maximum number of an array js

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