let arr = [1, 2, "test", "bob", false, 33]; //we can update first element arr[0] = 0; console.log(arr); //Output: [0, 2, "test", "bob", false, 33]; //We can update third element arr[2] = "not a test"; console.log(arr); //Output: [1, 2, "not a test", "bob", false, 33]; //Or we can update last element arr[arr.length-1] = 50; console.log(arr); //Output: [1, 2, "test", "bob", false, 50]