Find min and max values without Math functions in js

min_max.js

/**
 * These methods only work for an array of numbers
 */


function findMinimum(array) {
  let length = array.length;
  let min = Infinity;
  while(length--) {
    if(array[length] < min) {
      min = array[length];
    }
  }
  return min;
}

function findMaximum(array) {
  let length = array.length;
  let max = -Infinity;
  while(length--) {
    if(array[length] > max) {
      max = array[length];
    }
  }
  return max;
}