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Print a string with a newline to standard output

Print a string to standard output

A handle managing input from the Haskell program's standard input channel.

A handle managing output to the Haskell program's standard output channel.

Get the arguments from the terminal command

The computation exitFailure is equivalent to exitWith ( ExitFailure exitfail ) , where exitfail is implementation-dependent.

The computation exitSuccess is equivalent to exitWith ExitSuccess , It terminates the program successfully.