Standard variable types and limits.
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+ |
| LONG | 32 | signed integer | -2147483648 | +2147483647 | &, l | 9+ |
| ULONG | 32 | unsigned integer | 0 | +4294967295 | ul | 9+ |
| INTEGER | 32/64 [*] | signed integer | [*]32bit: -2147483648, 64bit: -9223372036854775808 | [*]32bit: +2147483647, 64bit: +9223372036854775807 | % | [*] |
| UINTEGER | 32/64 [*] | unsigned integer | 0 | [*]32bit: +4294967295, 64bit: +18446744073709551615 | u | [*] |
| LONGINT | 64 | signed integer | -9223372036854775808 | +9223372036854775807 | ll | 18+ |
| ULONGINT | 64 | unsigned integer | 0 | +18446744073709551615 | 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 | #, d | 15+ |
| enums | 32/64 [*] | signed integer | [*]32bit: -2147483648, 64bit: -9223372036854775808 | [*]32bit: +2147483647, 64bit: +9223372036854775807 | | [*] |
[*]
Integer and UInteger data types vary with platform, matching the size of pointers.
[**]
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
| Type | Character Size (in bytes) | Minimum Size (in characters) | Maximum Size (in characters) | Literal Suffix |
| String | 1 | 0 | [**]32bit: +2147483647, 64bit: +9223372036854775807 | $ |
| Zstring | 1 | 0 | [**]32bit: +2147483647, 64bit: +9223372036854775807 | [N/A] |
| Wstring | [*] | [*]0 | [*,**]32bit: +2147483647, 64bit: +9223372036854775807 | [N/A] |
[*]
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.
Boolean Type
| Type | Internal size in bits | Value |
| Boolean | 1-bit wide data (in a Byte) | 'False' or 'True' |
Arrays
| Platform | Maximum Subscript Range | Maximum Elements per Dimension | Minimum/Maximum Dimensions | Maximum Size (in bytes) |
| 32bit | [*][-2147483648, +2147483647] | [*]+2147483647 | 1/8 | [*]+2147483647 |
| 64bit | [*][-9223372036854775808, +9223372036854775807] | [*]+9223372036854775807 | 1/8 | [*]+9223372036854775807 |
[*]
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.
UDTs
| Platform | Maximum Size (in bytes) |
| 32bit | [*]+2147483647 |
| 64bit | [*]+2147483647 |
[*]
The actual maximum size will vary (smaller) with storage location and/or platform.
See also