Data types

A data type is a classification that defines for literals and variables the possible values, the operations that can be performed, and the way the values are stored.

Data type	Description	Default value
`BOOL`	Boolean	`0`, `FALSE`
`SINT`	Short integer	`0`
`INT`	Integer	`0`
`DINT`	Double integer	`0`
`LINT`	Long integer	`0`
`USINT`	Unsigned short integer	`0`
`UINT`	Unsigned integer	`0`
`UDINT`	Unsigned double integer	`0`
`ULINT`	Unsigned long integer	`0`
`REAL`	Real numbers	`0.0`
`LREAL`	Long real numbers	`0.0`
`TIME`	Duration	`T#0s`
`LTIME`	Duration	`LTIME#0s`
`DATE`	Date
`LDATE`	Long date	`LDATE#1970-01-01`
`TIME_OF_DAY` or `TOD`	Time of day	`TOD#00:00:00`
`LTIME_OF_DAY` or `LTOD`	Time of day	`LTOD#00:00:00`
`DATE_AND_TIME` or `DT`	Date and time of day
`LDATE_AND_TIME` or `LDT`	Date and time of day	`LDT#1970-01-01-00:00:00`
`STRING`	One-byte string of variable length	``(blank)
`WSTRING`	Variable length double byte string	``(blank)
`CHAR`	One-byte character	`$00`
`WCHAR`	Double byte character	`$0000`
`BYTE`	Bit sequence of length 8	`16#00`
`WORD`	Bit sequence of length 16	`16#0000`
`DWORD`	Bit sequence of length 32	`16#0000_0000`
`LWORD`	Bit sequence of length 64	`16#0000_0000_0000_0000`