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Module: IO
Function: hGetChar
Type: Handle -> IO Char
Description: hGetChar hdl reads a character from the file or channel managed by hdl
Related: hGetContents, hGetLine, hPrint, hPutChar, hPutStr, hPutStrLn

Example 1
File: /tmp/foo.txt : 

Hello, world!
Program source: 

import IO

main =  do hdl <- openFile "/tmp/foo.txt" ReadMode
	   aaa hdl

aaa hdl =  do t <- hIsEOF hdl
	      if t then return()
	           else do x <- hGetChar hdl
			   putChar x
			   aaa hdl

Output: Hello, world!