How to concat two (IO) Strings in Haskell?

Question

I know this sound very simple, but I failed to combine two strings into a new one.

The IO String "a" from a gtk entry is fetched by

      a <- (entryGetText text_field) 

The goal is to combine it like:

newstring = "Text: "+a

Any ideas to accomplish that? Thanks!

Answer 1

Using string concatenation:

 do a <- entryGetText text_field     let b = "Text:" ++ a     return b 

More simply:

 do a <- entryGetText text_field     return $ "Text:" ++ a 

You can play games too:

 ("Text:" ++) <$> (entryGetText text_field) 

Answer 2

I believe that in Haskell, the string concatenation operator is ++.