Reference Manual: (offline | online) Quickstart: (offline | online)

renpy.has_label

Example

if renpy.has_label('episode_3'):
    jump episode_3
else:
    "To Be Continued..."
    jump game_end

label episode_3:
    "It was a dark and stormy night..."     
Reference Manual: (offline | online) Quickstart: (offline | online)