A Syntactic Sugar for checking against a series of conditions
sign x | x > 0 = 1 -- if
| x < 0 = -1 -- else-if
| otherwise = 0 -- elseA Syntactic Sugar for checking against a series of conditions
sign x | x > 0 = 1 -- if
| x < 0 = -1 -- else-if
| otherwise = 0 -- else