\repeat volta question

[Jacques Menu]

Hello folks,

What does the ‘5’ mean in:

  \repeat volta 5 {
    \key c \major
    \time 4/4
    \clef "treble"
    c'1 
  }
  d1 
  \bar "|." 

  
Lily produces the following score, but where is the ‘5’ in it?

Thanks for your help!

JM