> In Python you have a simple function, `int()` that will happily turn any string consisting of numbers into a proper integer that can be used for math operatio

> In Python you have a simple function, `int()` that will happily turn any string consisting of numbers into a proper integer that can be used for math operations. For starters this is not the case, it does not work on a string of numbers: >>> int("123 890 123") Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: invalid literal for int() with base 10: '123 890 123' > Before we can select a function to convert a string into a number we must first pick a numerical type and before we can do that we must think real hard about how big of a number we're going to support in this application Aren't you doing the exact same thing in Python by picking `int()` over `float()`? > what type of string are we going to get from the command line? Well, this might be the case for system languages, but most have a single `String` type. Here is the program you described in Python def main(): n1 = input() n2 = input() sum = int(n1) + int(n2) print(sum) And here it's in Haskell main = do n1 <- getLine n2 <- getLine let sum = read n1 + read n2 print sum Accepting a single line of numbers is not much different main = do nums <- words <$> getLine let res = sum $ map read nums print res I didn't think much about it, it's not a lot of code and I guess it's easy to reason about?