From Clomosy Docs
function FloatToStr(Value: Extended):string;
The FloatToStr function converts a floating point number Value into a displayable string. The value is displayed to 15 digits of precision. The Value type may be any of the floating point types.
Example
var LongNumberValue, ShortNumberValue : float; { LongNumberValue = 1234567890.123456789; ShortNumberValue = 123.12; ShowMessage('LongNumberValue = '+FloatToStr(LongNumberValue)); ShowMessage('ShortNumberValue = '+FloatToStr(ShortNumberValue)); }
Output:
LongNumberValue = 1234567890,123456789
ShortNumberValue = 123,12