What are GitHub Actions variables and how do I use them?

What are GitHub Actions variables and how do I use them?

GitHub Actions variables are key-value pairs that you can use to store data and pass it between jobs in your workflows.

Can you give me an example of how to define and use a variable in a workflow?

Sure! You can define a variable in your workflow YAML file like this:

env:
  MY_VARIABLE: 'Hello, World!'

Then, you can use it in a job like this:

jobs:
  my_job:
    runs-on: ubuntu-latest
    steps:
      - name: Print variable
        run: echo $MY_VARIABLE

Are there any limitations on the types of values I can store in these variables?

Yes, variables can store strings, but they should not contain sensitive information unless you use secrets. Secrets are encrypted and can be accessed securely.

How do I set a secret variable in GitHub Actions?

You can set a secret variable in your repository settings under 'Secrets and variables'. Once set, you can access it in your workflow using the syntax ${{ secrets.MY_SECRET }}.