[Haskell-beginners] How to convert a float or double number into a string?

[yi lu]

If I use `show`,
show 123.45, it will return "123.45", a desired answer.

However, for
show 123.45678901234567890, it will return
"123.45678901234568".

I want to save all digits into a string. I suppose I use a wrong type of
number, which is Float.

But what can I do to work right?


Yi

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