You need to import
Data.Char
to get isUpper
.
GHCi error - "Not in scope: `isUpper'"
Question
I'm learning haskell and I'm trying to write some simple functions. Everything worked well until I've used function isUpper
. I'm unable to compile the project because of this error:
[1 of 1] Compiling Main ( C:\Users\...\src\Main.hs, interpreted )
C:\Users\...\src\Main.hs:147:25:
Not in scope: `isUpper'
Failed, modules loaded: none.
Prelude>
My code:
module Main where
main::IO()
main = undefined
stringIsUpper [] = True
stringIsUpper (x:ys) = (isUpper x) && (stringIsUpper(ys))
The goal of this code should be just to check if the inserted string consists of the uppercase letters. I'm using EclipseFP for development Thank you for your help
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