Cookbook/Interactivity

Problem	Solution	Examples
printing a string	putStr	Prelude> putStr "Foo" FooPrelude>
printing a string in a new line	putStrLn	Prelude> putStrLn "Foo" Foo
reading a string	getLine	Prelude> getLine Foo bar baz --> "Foo bar baz"

Printing a string

Strings can be output in a number of different ways.

Prelude> putStr "Foo"
FooPrelude>

As you can see, putStr does not include the newline character `\n'. We can either use putStr like this:

Prelude> putStr "Foo\n"
Foo

Or use putStrLn, which is already in the Standard Prelude

Prelude> putStrLn "Foo"
Foo

We can also use print to print a string, including the quotation marks.

Prelude> print "Foo"
"Foo"

Parsing command line arguments

TODO