Let's practice modules

Setup

• fork, clone, run index.js through node

Do

• Implement code for subtract module
• Add file and implement code for multiply module
• Add file and implement code for divide module
• Implement code for addOne in the addNumbers module
• Require addOne in index.js
• Add file and implement code for subtractNumbers module
• Make sure there are no errors and that all the calculations are logged to the screen