KA JS Arrays

Which of these lines of code show how to validly store an array with 3 items?

• var nums = [42, 3, 7];
• var nums = 3, 42, 7;
• var nums = [3];
• var nums = (3, 42, 7);

How would you access the second element in an array?

• nums.2
• nums[2]
• nums_1
• nums[1]

How would you change the first element in an array?

• nums[1] = "New!";
• nums = "New!";
• var nums[1] = "New!";
• nums[0] = "New!";

What property tells you how many items are in an array?

• length
• count
• items
• num

What method can you use to add an element to an array in JavaScript?

• pop()
• push()
• append()
• insert()

Which of these for loops would iterate through each item of the nums array (no more, no less)?

• for (var i = 0; i < nums; i++) { }
• for (var i = 1; i < nums.length; i++) { }
• for (var i = 1; i < nums; i++) { }
• for (var i = 0; i < nums.length; i++) { }