Haskell - Expressions

The following illustrates some haskell basics. It can be reproduced using ghci.

Types, Literals, and Constants along with Arithmetic and Boolean Operations

Expression	Type (:t)	Value	Comment
`2`	`Num a => a`	`2`
`2.03`	`Fractional a => a`	`2.3`
`'c'`	`Char`	`'c'`
`"hallo"`	`String`	`"hallo"`
`True`	`Bool`	`True`
`x=5`	`Num a => a`	`5`	Constant named `x`
`2 + 3`	`Num a => a`	`5`	Similar `-,*,^`
`2 / 3`	`Fractional a => a`	`0.6666666666666666`
`1 > 2`	`Bool`	`False`	Similar `<, <=, >=, ==, /=`
`True && False`	`Bool`	`False`	Similar `\|\|,not`
`((2+3)*5 > 1) \|\| not (1 > 2)`	`Bool`	`True`	Right part is not evaluated due to lazy evaluation

Expression	Type (:t)	Value	Comment
`sqrt(4)`	`Floating a => a`	`2.0`
`sqrt 4`	`Floating a => a`	`2.0`	Similar `abs,negate,signum,recip`
`sqrt`	`Floating a => a -> a`
`sqrt 3^2 + 4^2`	`Floating a => a`	`19.0`
`sqrt (3^2 + 4^2)`	`Floating a => a`	`5.0`
`negate(sqrt (3^2 + 4^2))`	`Floating a => a`	`-5.0`
`negate $ sqrt (3^2 + 4^2)`	`Floating a => a`	`-5.0`	Function application operator `$`
`(negate . sqrt) (3^2 + 4^2)`	`Floating a => a`	`-5.0`	Function composition operator `.` Reads `negate` after `negate . sqrt`
`(negate . length) "hallo"`	`Int`	`-5`
`negatedRoot = negate . sqrt`	`Floating c => c -> c`		Constant named `negatedRoot`