Azure DevOps Build with Parameters

Question

Is it possible in azure-pipelines.yml to define multi-value at runtime parameters so when you run the build you have to input so values

parameters:
  - name: image
    displayName: Pool Image
    type: string
    default: ubuntu-latest
    values:
    - windows-latest
    - vs2017-win2016
    - ubuntu-latest

Upon clicking Run in Azure DevOps you are presented with a dropdown and you select which option you require ???

Upon your selection, the build will only run certain steps or tasks based on your selection

Answer 1

I am not sure when it was added, but drop down parameters are now available:

parameters:
  - name: env
    displayName: Environment
    type: string
    values:
      - dev
      - prod
      - test
      - train
    default: train

will provide me with a drop down of dev, prod, etc., prepopulated with the value train.

Moreover, it will be a drop down if 4 values or more, and a radio dial with 3 or less. For instance,

  - name: department
    displayName: Business Department
    type: string
    values:
      - AI
      - BI
      - Marketing
    default: AI

will create a radio dial with AI selected by default. Note that the YAML is identical between the two, with the exception of 4 values in the first and 3 in the second.