function Round ( const Number : Extended ) : Int64;
Description
The Round function rounds a floating point Number to an Integer value.
The rounding uses Bankers rules, where an exact half value causes a rounding to an even number:
12.4 rounds to 12
12.5 rounds to 12 // Round down to even
12.6 rounds to 13
13.4 rounds to 13
13.5 rounds to 14 // Round up to even
13.6 rounds to 14
Notes
The Trunc function does the same, but returns the integer in an Integer value.
Related commands
Frac The fractional part of a floating point number
Int The integer part of a floating point number as a float
Trunc The integer part of a floating point number
Example code : A simple example
begin
ShowMessage('Round(12.75) = '+IntToStr(Round(12.75)));
ShowMessage('Trunc(12.75) = '+IntToStr(Trunc(12.75)));
ShowMessage(' Int(12.75) = '+FloatToStr(Int(12.75)));
ShowMessage(' Frac(12.75) = '+FloatToStr(Frac(12.75)));
end;
Show full unit code
Round(12.75) = 13
Trunc(12.75) = 12
Int(12.75) = 12
Frac(12.75) = 0.75