rockettdev/js-fundamentals-functions-1

Programming Fundamentals: Functions 1

Learning Objectives

• Call functions to run the code in them and get the return value as a result
• Create functions that take a single parameter
• Create functions that take multiple parameters

Introduction

In this exercise you will first call some predefined functions and then create your own functions that must return a value based on the function requirements and the parameters supplied to the function

Setup

• Fork this repository and clone your forked version to your machine

• Install dependencies by running the command below while in the project's root directory:

  npm ci

Instructions

• Read through the numbered comments - eg 1. Define a function... - in the following files to understand the requirements of this exercise.

  • src/calling-functions.js
  • src/creating-functions.js
  • src/creating-functions-multiple-args.js

• Write your code directly below the numbered comment.

• Add console.log()s to get visibility on your solution and run the file with the command node src/calling-functions.js etc

• See src/example.js for some example functions

Running tests

• To verify your solutions, run the test suite by running the npx jasmine command followed by the path to the corresponding test file for each src/.js file above, eg:

  npx jasmine spec/calling-functions.spec.js

• Alternatively, run:

  npm test

• To begin with, almost all of the tests will fail - only the example tests will pass with a green . You'll see many red Fs in your console, like the image below:

  

• Your solution is complete when the all the red Fs have been replaced with green .s in your console, as shown below: