Revision as of 11:32, 9 July 2009
1 Reading a string
Strings can be read as input using getLine.
Prelude> getLine Foo bar baz "Foo bar baz"
2 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"
3 Parsing command line arguments