| Integer | -2147483648..2147483647 | signed | 32-bit |
| Cardinal | 0..4294967295 | unsigned | 32-bit |
| Shortint | -128..127 | signed | 8-bit |
| Smallint | -32768..32767 | signed | 16-bit |
| Longint | -2147483648..2147483647 | signed | 32-bit |
| Int64 | -2^63..2^63? | signed | 64-bit |
| Byte | 0..255 | unsigned | 8-bit |
| Word | 0..65535 | unsigned | 16-bit |
| Longword | 0..4294967295 | unsigned | 32-bit |
| char | -128 到 127 或者 0 到 255 | 1 个字节 | |
| unsigned char | 0 到 255 | 1 个字节 | |
| signed char | -128 到 127 | 1 个字节 | |
| int | -2147483648 到 2147483647 | 4 个字节 | |
| unsigned int | 0 到 4294967295 | 4 个字节 | |
| signed int | -2147483648 到 2147483647 | 4 个字节 | |
| short int | -32768 到 32767 | 2 个字节 | |
| unsigned short int | 0 到 65,535 | 2 个字节 | |
| signed short int | -32768 到 32767 | 2 个字节 | |
| long int | -9,223,372,036,854,775,808 到 9,223,372,036,854,775,807 | 8 个字节 | |
| signed long int | -9,223,372,036,854,775,808 到 9,223,372,036,854,775,807 | 8 个字节 | |
| unsigned long int | 0 to 18,446,744,073,709,551,615 | 8 个字节 | |
| float | +/- 3.4e +/- 38 (~7 个数字) | 4 个字节 | |
| double | +/- 1.7e +/- 308 (~15 个数字) | 8 个字节 | |
| long double | +/- 1.7e +/- 308 (~15 个数字) | 16 个字节 | |
| wchar_t | 2 或 4 个字节 | 1 个宽字符 | |
结束：
原文：https://www.cnblogs.com/FKdelphi/p/10509078.html