# Simple monad examples

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Revision as of 02:38, 19 March 2006 by Twobitsprite (talk | contribs)

This page is designed to show some simple examples of using monads.

I personally found that I reached monad-enlightenment once I contrived this simple example while playing around to see the "guts" of a monadic expression:

```
Just 5 >>= (\ x -> if (x == 0) then fail "zero" else Just (x + 1) )
```

Which results in:

```
Just 6
```

Some simple exercises:

What would the following snippets resolve to?

```
Just 0 >>= (\ x -> if (x == 0) then fail "zero" else Just (x + 1) )
Nothing >>= (\ x -> if (x == 0) then fail "zero" else Just (x + 1) )
```