hot to find the max value in array without any bult in method in js code example

Example 1: how to return the max and min of an array in javascript

function minMax(arr) {
  return [Math.min(...arr), Math.max(...arr)];
}

Example 2: js return the highest and lowest number

console.log(Math.max(1, 3, 2));
// expected output: 3

console.log(Math.max(-1, -3, -2));
// expected output: -1

const array1 = [1, 3, 2];

console.log(Math.max(...array1));
// expected output: 3