Standard Datatypes
| Data Type | Description | Example | Declaration |
| String | A sequence of characters. X++ supports various string types: left-aligned, right-aligned, fixed length, or non-fixed length. Maximum length is 999 characters. | "Hello, World!" | name str |
| Integer | A whole number without a decimal point. | 1090 | age int |
| Real | A number with a decimal point. | 3.14 | pi real |
| Date | Stores the day, month, and year. | 10\29\1978 | birthday date |
| UTCDateTime | Holds year, month, day, hour, minute, and second, including time zone information. | 9/28/2008 07:11:02 amutc | meetingTime utcDateTime |
| Enum | A set of named constants with integer values assigned internally. The first value has the number 0, the second has 1, and so on. | Color { Red, Green, Blue } | |
| Boolean | Can only be true or false. | isRegistered boolean | |
| Time | Stores hours, minutes, and seconds. Use the timeOfDay system type for declaration. | 15:23:08 | meetingDuration timeOfDay |
| GUID | A Globally Unique Identifier, a reference number that is unique in any context. | {3F2504E0-4F89-11D3-9A0C-0305E82C3301} | userId guid |
| Int64 | A large integer represented by 64 bits. | 5637144579 | populationCount int64 |
Extended Data Types
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