How to concatenate string to item value

[ccdr]

Hello
I'm going to concatenate a string say {" to certain parsed item of floating type using Expression plugin.
How to make up the expression escaping the " symbol? Should I need to explicitly cast floating type to string type?
NEW_ITEM = "{""+ITEM, correct?
Thanks

[Arthur Grasin]

Hello,

NEW_ITEM = '{'+FLOATTOSTR(ITEM)

[ccdr]

Hello,

NEW_ITEM = '{'+FLOATTOSTR(ITEM)

Thanks for the timely feedback.
Then how to escape the character double quote " within the single quote mark?

[Arthur Grasin]

NEW_ITEM = '{"'+FLOATTOSTR(ITEM)