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Haskell / Values and Types

Float and Double

Learn Float and Double in Haskell through a focused explanation, a dedicated topic-specific example, an engineering boundary, and a mastery check.

10 min read • Beginner

Float and Double is a focused Haskell lesson inside Values and Types. The example uses the construct named in the lesson directly rather than reusing a generic placeholder.

Trace the example from its inputs through Float and Double and identify the behavior that would change if that construct were removed or replaced. Pay attention to the language-specific rules shown by the syntax, because neighboring lessons intentionally exercise different mechanisms.

Topic-specific example

haskell-0004-c4f113af9b.hs
haskell Try It Live 
sample5 :: [Int]
sample5 = [5,6,7]
main = print (sum sample5) -- Float and Double
Edge case / engineering note

For Float and Double, test one realistic boundary: empty data, invalid input, unavailable resources, lifetime/cleanup, type constraints, or concurrency timing where applicable. A successful happy path is not enough to prove the construct is used correctly.

Content source & attribution
Original Syntaxis Content · Original Syntaxis Content

Lesson quizzes

Float and Double Mastery Check →
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Int and Integer
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Char and String