title: How to add conditional parameter to jenkins
body: <p>I want to add a conditional parameter to jenkins job. In other words, I want to add a boolean parameter when checked, another string parameter appears to the user when they build the job. If not checked the string parameter should not appear as a parameter when the user builds the job (Kind of a similar behaviour to the conditional steps of jenkins but on parameters.). Is their a plugin for that?</p>
  
  <p>In the image below, if repo_update is not checked: Clean and Changesets should not be present to the user if they are building the job. 
  <a href="https://i.stack.imgur.com/cfMau.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cfMau.png" alt="enter image description here"></a></p>