There are three built-in REPL modes in Julia: the Julia mode, the help mode, and the shell mode.
The Julia REPL comes with a built-in help system. Press ? at the
julia> prompt to access the
At the help prompt, type the name of some function or type to get help for:
Even if you do not spell the function correctly, Julia can suggest some functions that are possibly what you meant:
help?> printline search: Couldn't find printline Perhaps you meant println, pipeline, @inline or print No documentation found. Binding printline does not exist.
This documentation works for other modules too, as long as they use the Julia documentation system.
julia> using Currencies help?> @usingcurrencies Export each given currency symbol into the current namespace. The individual unit exported will be a full unit of the currency specified, not the smallest possible unit. For instance, @usingcurrencies EUR will export EUR, a currency unit worth 1€, not a currency unit worth 0.01€. @usingcurrencies EUR, GBP, AUD 7AUD # 7.00 AUD There is no sane unit for certain currencies like XAU or XAG, so this macro does not work for those. Instead, define them manually: const XAU = Monetary(:XAU; precision=4)
See Using Shell from inside the REPL for more details about how to use Julia's shell mode, which is accessible by hitting ; at the prompt. This shell mode supports interpolating data from the Julia REPL session, which makes it easy to call Julia functions and make their results into shell commands: