Mat & Syl wrote in message <71fcr5$9to@sifon.cc.mcgill.ca>...
>I need a function to convert float to string and other one for string to
>float.
The language attributes 'Image, and 'Value, respectively, do just that.

Here are the appropriate excerpts from Annex K of the Ada95 Reference
Manual:

88 S�Image For every scalar subtype S:

89 S�Image denotes a function with the following specification:

90 function S'Image(Arg : S'Base)
return String

91 The function returns an image of the value of Arg as a String. See 3.5.

264 S�Value For every scalar subtype S:

265 S�Value denotes a function with the following specification:

266 function S'Value(Arg : String)
return S'Base

267 This function returns a value given an image of the value as a String,
ignoring any leading or trailing spaces. See 3.5.

David C. Hoos, Sr.