[pklausler]

You don't have to use indentation for nesting in Haskell. Haskell's syntax is actually defined with curly braces and semicolons and you're free to use them. It's just smart enough to add missing curly braces and semicolons at the right places according to indentation when they're missing.

[tennix]

Yeah, you're right. But almost all of the community uses indentation which defined as layout in Haskell2010 Language Report instead of semicolons and curly braces