ROUND Function (Decimal)

Microsoft Dynamics Nav 2009

Rounds the value of a numeric variable.

```
NewNumber := ROUND(Number [, Precision] [, Direction])
```

Parameters

Number

Type: Decimal

The number that you want to round.

Precision

Type: Decimal

This optional parameter determines the precision used when rounding. If you do not specify a Precision parameter, then the following steps are used to specify the precision:

1. The function ReadRounding in Codeunit 1, Application Management, is called. ReadRounding returns a decimal value that is the precision. By default, the ReadRounding function returns the Amount Rounding Precision field from the GLSetup table.

2. If you have customized Codeunit 1 and it does not implement the ReadRounding function, then the No. of digits after decimal in the Regional and Language Options on the current computer is used to specify the precision. If the No. of digits after decimal does not specify a valid value, then the precision is specified as 2 digits after the decimal.

Direction

Type: Text or Code

This optional parameter specifies how to round the Number parameter. The default rounding method is '='. The following are the options for rounding:

• '=' rounds up or down to the nearest value (default). Values of 5 or greater are rounded up. Values less than 5 are rounded down.

• '>' rounds up

• '<' rounds down

Property Value/Return Value

Type: Decimal

The rounded result.

Example

This example shows how to use the ROUND function. This example requires that you create the following variables and text constant in the C/AL Globals window.

Variable name DataType

DecimalToRound

Decimal

Direction

Text

Precision

Decimal

Result

Decimal

Text Constant ENU Value

Text000

ROUND(%1, %2, %3) returns %4.

```DecimalToRound := 1234.56789;
Direction := '>';
Precision := 0.001;
Result := ROUND(DecimalToRound, Precision, Direction);
MESSAGE(Text000, Format(DecimalToRound,0,1), Precision, Direction, Result);
```

On a computer with the regional format set to English (United States), the message window displays the following:

ROUND(1234.56789, 0.001, >) returns 1,234.568

The following table displays some additional ROUND examples.

Number Precision Direction Rounded number

1234.56789

100

=

1200

1234.56789

0.1

=

1234.6

1234.56789

0.001

=

1234.568

1234.56789

0.001

<

1234.567

1234.56789

0.001

>

1234.568

-1234.56789

100

=

-1200

-1234.56789

0.1

=

-1234.6

-1234.56789

0.001

=

-1234.568

-1234.56789

0.001

<

-1234.567

-1234.56789

0.001

>

-1234.568

When you round down ('<') a negative number, the following occurs: -1234.56789 is rounded down to -1234.567. However, -1234.567 is a mathematically greater value than -1234.56789.

When you round up ('>') a negative number, the following occurs: -1234.56789 is rounded up to -1234.568. However, -1234.568 is a mathematically smaller value than -1234.56789.