Standard Data Type Limits
Standard variable types and limits.
Numeric Types
[*] Long and Ulong data types vary with platform. Currently, they are aliases to either Integer or LongInt and their unsigned versions, respectively.
[**] The minimum and maximum values for the floating-point types Single and Double are, respectively, the values closest to zero and the values closest to positive and negative infinity.
String Types
[*] Unicode, or "wide", characters vary in both size and availability with platform.
[**] All runtime library string procedures take and produce Integer values for sizes and positions. The actual maximum size will vary (smaller) with storage location and/or platform.
Arrays
[*] All runtime library array procedures take and produce Integer values for subscripts and indexes. The actual limits will vary (smaller) with the number of dimensions, element size, storage location and/or platform.
Numeric Types
| Type | Size (in bits) | Format | Minimum Value | Maximum Value | Literal Suffix | Sig. Digits |
| BYTE | 8 | signed integer | -128 | +127 | 2+ | |
| UBYTE | 8 | unsigned integer | 0 | +255 | 2+ | |
| SHORT | 16 | signed integer | -32768 | +32767 | 4+ | |
| USHORT | 16 | unsigned integer | 0 | 65535 | 4+ | |
| INTEGER | 32 | signed integer | -2147483648 | +2147483647 | %, l | 9+ |
| UINTEGER | 32 | unsigned integer | 0 | 4294967295 | ul | 9+ |
| LONG | [*] | signed integer | [*] | [*] | & | [*] |
| ULONG | [*] | unsigned integer | [*] | [*] | [*] | |
| LONGINT | 64 | signed integer | -9 223 372 036 854 775 808 | +9 223 372 036 854 775 807 | ll | 18+ |
| ULONGINT | 64 | unsigned integer | 0 | +18 446 744 073 709 551 615 | ull | 19+ |
| SINGLE | 32 | floating point | [**]+/-1.401 298 E-45 | [**]+/-3.402 823 E+38 | !, f | 6+ |
| DOUBLE | 64 | floating point | [**]+/-4.940 656 458 412 465 E-324 | [**]+/-1.797 693 134 862 316 E+308 | # | 15+ |
[**] The minimum and maximum values for the floating-point types Single and Double are, respectively, the values closest to zero and the values closest to positive and negative infinity.
| Type | Character Size (in bytes) | Minimum Size (in characters) | Maximum Size (in characters) | Literal Suffix |
| String | 1 | 0 | [**]+2147483647 | $ |
| Zstring | 1 | 0 | [**]+2147483647 | [N/A] |
| Wstring | [*] | [*]0 | [*,**]+2147483647 | [N/A] |
[**] All runtime library string procedures take and produce Integer values for sizes and positions. The actual maximum size will vary (smaller) with storage location and/or platform.
| Maximum Subscript Range | Maximum Elements per Dimension | Minimum/Maximum Dimensions | Maximum Size (in bytes) |
| [*][-2147483648, +2147483647] | [*]+2147483647 | 1/9 | [*]+2147483647 |
See also
ProPgIdentifierRules usage of suffixes for variables
ProPgLiterals usage of suffixes for literals / numbers
ProPgLiterals usage of suffixes for literals / numbers
