Truth And Controls

Section

nil

Flow Of Control

x = 10
y = 10
x

10

if x > 9 do
  "it's true"
end

"it's true"

if x > 10 do
  "it's true"
else
  "it's false"
end

"it's false"

result =
  cond do
    x > 15 -> "so very hot"
    x > 10 -> "a little hot"
    true -> "whatever"
  end

"whatever"

result

"whatever"

answer =
  case x > 10 do
    # pattern -> thing-to-execute
    true -> "it's true"
    # _ -> wild card, match everything
    _ -> "it's false"
  end

"it's false"

looks_safe =
  case do_something_dangerous() do
    {:ok, result} -> result
    error -> error
  end

error: undefined function do_something_dangerous/0 (there is no such import)
  #cell:24o7ojgnyveydlfllt5fc3pttzvnt74n:2