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...gs to try the examples. They have an interactive prompt where you type in expressions, like a function plus its parameters. Then they print the evaluated result foo :: Int -> Int

.../code&gt;, but that syntax is not allowed in types (although it is allowed in expressions with the <code&gt;TupleSections</code&gt; extension enabled). However, you can ce ...s for special attention by providing a special syntactic sugar for monadic expressions: the <code&gt;do</code&gt;-notation. (As of GHC 8, <code&gt;do</code&gt;-notation can b

...uction to IO]] which can help you learn the basics (e.g. the syntax of I/O expressions) before continuing on.'' We could define <code&gt;Time</code&gt; as a regular Haskell type: