# Delphi/Lazarus: Round Decimal Numbers up, down and normally

Tip by Delphian | Last update on 2021-06-28 | Created on 2013-06-27

**In this tip, I would like to show you how you can round decimal numbers such as extended, float or real numbers using Delphi or Lazarus.**

You have the possibility to round numbers up, down or according to Bankers' Rules.

**Overview:** Lazarus as well as Delphi are providing the following functions you can use for rounding:

**Round:**normal, convergent rounding (Banker's Rule)**Trunc:**crops decimal places (=rounding down)**Ceil:**rounding up (contained in Math)**Floor:**rounding down (contained in Math)**Int:**makes an integer value from a decimal number (=rounding down)**Fra****c:**crops all before the decimal places/replaces the integer part of the number with 0

**Example:** In this example, I show you which results you can expect when using this functions.

Call Result Call Result round(7.2) 7 round(7.8) 8 trunc(7.2) 7 trunc(7.8) 7 ceil(7.2) 8 ceil(7.8) 8 floor(7.2) 7 floor(7.8) 7 int(7.2) 7 int(7.8) 7 frac(7.2) 0.2 frac(7.8) 0.8

**Hint:** For the functions Ceil() and Floor(), the unit "Math" has to be added to the uses-clause. Round(), Trunc(), Int() and Frac() are parts of the unit "System" which is usually already included in the uses section.

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