Update and rename first.yml to environment-variables.yml

adding exercise files

.github/workflows/environment-variables.yml

@@ -0,0 +1,41 @@
+name: Environment Variables
+env:
+  WORKSPACE_ENVIRONMENT_VARIABLE: 'custom workspace environment variable'
+on: [push]
+jobs:
+  ubuntu:
+    env:
+      JOB_ENVIRONMENT_VARIABLE: 'custom job environment variable for ubuntu'
+    runs-on: ubuntu-latest
+    steps:
+      - name: Print custom environment variables from ubuntu-latest
+        env:
+          STEP_ENVIRONMENT_VARIABLE: 'custom step environment variable for bash'
+        run: |
+          echo "Accessing environment variables in run command"
+          echo "$WORKSPACE_ENVIRONMENT_VARIABLE"
+          echo "$JOB_ENVIRONMENT_VARIABLE"
+          echo "$STEP_ENVIRONMENT_VARIABLE"
+          echo "------------------------------------------------------"
+          echo "Accessing environment variables using env context"
+          echo "${{ env.WORKSPACE_ENVIRONMENT_VARIABLE }}"
+          echo "${{ env.JOB_ENVIRONMENT_VARIABLE }}"
+          echo "${{ env.STEP_ENVIRONMENT_VARIABLE }} Not defined"
+  windows:
+    env:
+      JOB_ENVIRONMENT_VARIABLE: 'custom job environment variable for windows'
+    runs-on: windows-latest
+    steps:
+      - name: Print custom environment variables from windows-latest
+        env:
+          STEP_ENVIRONMENT_VARIABLE: 'custom step environment variable for powershell'
+        run: |
+          echo "Accessing environment variables in run command"
+          echo "$Env:WORKSPACE_ENVIRONMENT_VARIABLE"
+          echo "$Env:JOB_ENVIRONMENT_VARIABLE"
+          echo "$Env:STEP_ENVIRONMENT_VARIABLE"
+          echo "------------------------------------------------------"
+          echo "Accessing environment variables using env context"
+          echo "${{ env.WORKSPACE_ENVIRONMENT_VARIABLE }}"
+          echo "${{ env.JOB_ENVIRONMENT_VARIABLE }}"
+          echo "${{ env.STEP_ENVIRONMENT_VARIABLE }} Not defined"