program main
  fn half(value: f64) -> f64
    binary /
      var value
      float 2
  fn weighted(base: f64, scale: f64) -> f64
    binary +
      var base
      binary *
        var scale
        float 2.5
  fn local_total() -> f64
    local let subtotal: f64
      call weighted
        float 4
        float 3
    binary -
      var subtotal
      float 1.5
  fn close_enough(value: f64) -> bool
    if
      binary >
        var value
        float 9
      binary <
        var value
        float 11
      bool false
  fn exact_literal() -> bool
    binary =
      call half
        float 7
      float 3.5
  fn main() -> i32
    call std.io.print_f64
      call local_total
    if
      call close_enough
        call local_total
      int 0
      int 1
  test "f64 arithmetic returns exact fixture value"
    binary =
      call local_total
      float 10
  test "f64 comparison works in predicates"
    call close_enough
      call local_total
  test "f64 division and equality"
    call exact_literal