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Module: Random
Function: getStdRandom
Type: (StdGen -> (a, StdGen)) -> IO a
Description: uses the supplied function to get a value from the current global random generator, and updates the global generator with the new generator returned by the function.
Related:

Example 1
Program source: 

import Random

main = do a <- drawInt 1 10
 	  b <- drawInt 1 10
 	  x <- drawDouble 0.0 1.0
 	  print a
	  print b
	  print x

drawInt :: Int -> Int -> IO Int
drawInt x y = getStdRandom (randomR (x,y))
	   
drawDouble :: Double -> Double  -> IO Double
drawDouble x y = getStdRandom (randomR (x,y))

Output: 6

Output: 2

Output: 0.8674070605466624