**Operator Type:**

**Operator Scope of Action:**

**Operator Purpose:**

**Operator First Added:**

**Operator Last Altered:**

Function [other Function type actions]

Item [operators of similar scope]

Mathematical [other Mathematical operators]

Baseline

As at baseline

**round(sourceNum)**

round() rounds the value of its **sourceNum** argument to the nearest integer.

The Number.format, Number.precision and format() functions all round numbers in this manner when shortening numbers during formatting. A partial integer over .50 always round up, everything else rounds down. Thus:

`$MyNumber = round(4.0);`

gives 4

`$MyNumber = round(4.2);`

gives 4

`$MyNumber = round(4.5);`

gives 5

`$MyNumber = round(4.7);`

gives 5

The round function with work on string literal or String attribute values that are just numbers:

`$MyNumber = round("4.2");`

gives 4

`$MyNumber = round("4.7");`

gives 5

`$MyString = round(4.2);`

gives "4"

`$MyString = round(4.7);`

gives "5"

`$MyString = round("4.2");`

gives "4"

`$MyString = round("4.7");`

gives "5"

There are no functions to always force a round down (floor) or up (ceiling), but these can be simulated with a bit of action code.

For a practical example, assume you would like to round you calculation (upward) to the nearest 100, so if the calculation output is 167 it should be 200, for a result of 540 a result of 600, and so on. This can be done like so:

`$MyNumber = 100*ceil($MyNumber/100);`

as if you used round(), as in:

`$MyNumber = 100*ceil($MyNumber/100);`

the result would vary depending on whether $MyNumber started above or below the nearest 50. An opposite of the first example, i.e. where everything rounds downwards to the nearest 100 can be done using floor():

`$MyNumber = 100*floor($MyNumber/100);`