Calculator

Contributors: Trevor Rapp

calculator.mov

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DESCRIPTION

"Do you have any hobbies?"

"I count."

-- Count von Count, Sesame Street

This is version 1.0 of a JavaScript project that creates a basic calculator.

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QUICK START GUIDE

1. Create a Folder to hold the program

• in the terminal type mkdir Calculator or whatever other name you want to call it.
• navigate into the folder by typing cd Calculator
• clone the program into the Calculator folder you just created by typing:

https://github.com/trrapp12-ironyard/calculator.git

2. Make sure you are still in the Calculator folder. You can type `cd ..` to move to navigate out to the parent directory or `cd` to navigate further down into the file.

3. You should be able to see a page named 'index.html'. If not use `cd ..` to navigate back into the Calculator folder.

4. Type `start index.html` to run the program from the terminal (in Windows), or `open index.html` on a Mac.

5. The program runs from prompts displayed by the browser as dialog boxes on the page. Due to the nature of the `window.prompt()` function, to page will not execute any more of the JavaScript until the prompt is answered. Therefore:

• if you fail to click "continue", the page won't advance
• if you put a non-number (NaN) value in the prompt, it will return an error message.
• if you do not put any number in it will submit a "Null" value, and you will get an error message.

6. Enjoy!

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THIS PROJECT DEMONSTRATES:

• use of an IFFE function.

• use of multiple functions to create a script.

• use of hoisting in JavaScript.

• use of parameters in functions.

• use of prompt() to get user input.

• use of === as a strict equality operator.

• ECMAScript 6: use of let as a block scope variable.

• use of index.html

• use of <script> tags

• Flex-box

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CHALLENGES I OVERCAME...

• It was a pretty straight forward bootcamp assignment, but as always it's always easy when you know the answer. At the time the new material was new and I just had to put in time and practice learning.

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MY OWN PERSONAL CONTRIBUTIONS INCLUDED

• This project was a bootcamp assignment, but the work provided is all my own.

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ATTRIBUTIONS

• no attributions necessary

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YOU CAN FIND ME AT:

*For more information see my LinkedIn, or return to my Github