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Hello World
Hello World

Hello World

Tutorial Exercise
“Hello, World!” will get you writing some Bash and familiarise yourself with the Exercism workflow. Completing it unlocks the rest of the Bash Track.

Instructions

The classical introductory exercise. Just say "Hello, World!".

"Hello, World!" is the traditional first program for beginning programming in a new language or environment.

The objectives are simple:

  • Write a function that returns the string "Hello, World!".
  • Run the test suite and make sure that it succeeds.
  • Submit your solution and check it at the website.

If everything goes well, you will be ready to fetch your first real exercise.

Unlike many other languages here, bash is a bit of a special snowflake. If you are on a Mac or other unix-y platform, you almost definitely already have bash. In fact, anything you type into the terminal is likely going through bash.

The downside to this is that there isn't much of a development ecosystem around bash like there is for other languages, and there are multiple versions of bash that can be frustratingly incompatible. Luckily we shouldn't hit those differences for these basic examples, and if you can get the tests to pass on your machine, we are doing great.

Installation

As mentioned above, if you are on a unix-like OS (Mac OS X, Linux, Solaris, etc), you probably already have bash.

Testing

As there isn't much of a bash ecosystem, there also isn't really a de facto leader in the bash testing area. For these examples we are using bats. You should be able to install it from your favorite package manager, on OS X with homebrew this would look something like this:

$ brew install bats-core
==> Downloading
https://github.com/bats-core/bats-core/archive/v1.2.0.tar.gz
==> Downloading from
https://codeload.github.com/bats-core/bats-core/tar.gz/v1.2.0
########################################################################
100.0%
==> ./install.sh /opt/boxen/homebrew/Cellar/bats/1.2.0
🍺  /opt/boxen/homebrew/Cellar/bats/1.2.0: 10 files, 60K, built in 2
seconds
Last updated 10 November 2021
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