Editing Fudgets (section)

== Example ==
<syntaxhighlight lang="haskell">
factorialF  = stdoutF >==< mapF (show . factorial . read) >==< stdinF
factorial   :: Integer -> Integer
factorial n = product [1..n]
</syntaxhighlight>

The code is self-describing considering that <code>>==<</code> is sequential fudget plumbing and <code>mapF</code> is fudget that takes a function of one argument and makes a fudget which output is input applied to that function. Fudget composition must be read from right to left, as a simple function composition. Now you can simply write:
<syntaxhighlight lang="haskell">
main = fudlogue factorialF
</syntaxhighlight>

compile and run. For every given integer value it will print its factorial.