Finding the Largest value in an Array (javascript)

readings.js

var readings = [0, 5, 9, 18, 2, 9, 5];
// find the largest value in the array 'readings'

var max = 0;
for (var i = 0; i < readings.length; i++) {
  if (readings[i] > max) {
    max = readings[i];
  }
}
console.log('The highest reading is: ' + max);

You can copy this whole thing into the javascript console and it will work! Try it out!