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If I have a floating point number in Haskell how do I test if it is a whole number.
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Check if float is integer: is_integer() float has is_integer() method that returns True if the value is an integer, and False otherwise. For example, a function that returns True for an integer number ( int or integer float ) can be defined as follows. This function returns False for str .
If you are using an interactive Haskell prompt (like GHCi) you can type :t <expression> and that will give you the type of an expression. e.g. or e.g.
Yes, an integral value can be added to a float value. The basic math operations ( + , - , * , / ), when given an operand of type float and int , the int is converted to float first.
Haskell has two integral types, namely Int and Integer . Int is the type of limited-precision integers; this means that there is a smallest integer of type Int , namely minBound , and a greatest integer of type Int , namely maxBound .
isInt x = x == fromInteger (round x) > isInt 2 True > isInt 2.5 False And just a reminder: always remember the almighty curse of the floating point numbers:
> isInt (0.1^2*200) False > 0.1^2*200 2.0000000000000004 If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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