Haskell: ghc Vs ghci

‘ghc’ compiles Haskell application to binary code, where as ghci is an interpreter, where you can evaluate expressions and get results immediately.

$ ghci
GHCi, version 7.10.3: http://www.haskell.org/ghc/  :? for help
Prelude> 
Prelude> 10 + 20
30
Prelude> 
Prelude> 10 + 20 * 30
610

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