title: Jenkins - How can i pass parameters from the Upstream to Downstream
body: <p>I have 3 builds:
  A -  is the Master build which control the flow
  B- Anoter build 
  C-  will be executed after B
  I want to add a String parameter to A so the user will enter some String manually, and i'm not sure how can i path this parameter to B.
  lets say that this is my build flow: </p>
  
  <p>build("B")
  build("C")
  I don't know how can i path the parameter to B, should i do that from the build flow or from the B build configuration and how can i do that.</p>
  
  <p>Thanks in advance
  Alex</p>