ghci

The Glasgow Haskell Compiler's interactive environment.

=> More information.

• Start a REPL (interactive shell):

ghci

• Start a REPL and load the specified Haskell source file:

ghci {source_file.hs}

• Start a REPL and enable a language option:

ghci -X{language_option}

• Start a REPL and enable some level of compiler warnings (e.g. all or compact):

ghci -W{warning_level}

• Start a REPL with a colon-separated list of directories for finding source files:

ghci -i{path/to/directory1}:{path/to/directory2}

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