Haskell: doesDirectoryExist: Check for directory existence

System.Directory module provides doesDirectoryExist funciton, which takes a directory name as input and return True, if the directory exists, else False. Following is the signature of doesDirectoryExist function.

doesDirectoryExist :: FilePath -> IO Bool

Prelude System.Directory> doesDirectoryExist "/Users"
True
Prelude System.Directory> doesDirectoryExist "/Users123"
False
Prelude System.Directory> doesDirectoryExist "/Users/harikrishna_gurram"
True

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