Objective

Build a CodePen.io app that is functionally similar to this.

User Stories

• I can add, subtract, multiply and divide two numbers.
• I can clear the input field with a clear button.
• I can keep chaining mathematical operations together until I hit the equal button, and the calculator will tell me the correct output.

Note On Calculator Logic: This calculator uses Immediate Execution Logic.

EXAMPLE: 3 + 5 x 6 - 2 / 4 =

Immediate Execution Logic: 11.5
Formula/Expression Logic: 32.5

Also have a look here:

• The application on CodePen.io
• The challenge on freeCodeCamp