Review for Challenge 4

What is a radio button?

What is a check box?

How can you verify if a radio button is selected?

What will be the final value of amount after executing the code:
var amount = 10
amount = amount + 20

Common name of a device that detects a signal, that is a form of energy, and converts it to another

Which are the sensors included in a phone?

What is the purpose of the instruction Math.floor() ?

The instruction Math.floor (Math.random()*10)+1 will produce a random number in the range of:

How would you generate a random number from 0 to 27

Which are the parts of a for loop?

How could you create an array that holds the first 3 months of the year?

How could you show the 2nd element of the array named months in a pop-up window?

What property tells how many elements are included in an array?