(if (> (+ 5 4) 7)
  # then
  (print "5+4 > 7")
  # else
  (print "something has gone terribly wrong"))

(if (not true)
  {
    # this is a serie of expressions inside the 'then' block of the conditional
    (print "true is... not true?")
    (foo bar 5)
    (+ 5 4) }
  {
    # the 'else' block can also have multiple expressions in it
    (print "something")
    (print "is weird") })

# conditions can be used as expressions too
(let n (if (> 5 6) "error" "5 < 6"))
(print n)