Follow the instructions in conditionals.js to get more comfortable using if, else, and else-if statements. You'll have to uncomment the code associated with each challenge as you progress.
Conditionals are a super important tool in your toolbox, as they allow the program's you right to react dynamically to variable circumstances. The challenges outlined in conditionals.js will give you numerous examples of where conditionals are necessary.
Open up conditionals.js and go through the challenges one at a time. The code associated with each challenge is commented to avoid clogging up your output; so uncomment it first, and then when your code works as expected, comment it again and move on.