IE(1)                       General Commands Manual                      IE(1)

NNAAMMEE
       if - the roff conditional instruction with else-clause

DDEESSCCRRIIPPTTIIOONN
       One-line true condition.
       Text following the true condition.
       Two-line true condition.
       Text following the false condition.
       Two-line else after false.
       Else after empty condition.
       Else after negated empty condition.
       If .el\{ works, nothing follows here:

OpenBSD                          July 4, 2017                            IE(1)