c++ data type
| Type | Size in Bytes | Range |
|---|---|---|
| char | 1 | -127 to 127 or 0 to 255 |
| unsigned char | 1 | 0 to 255 |
| signed char | 1 | -127 to 127 |
| int | 4 | -2147483648 to 2147483647 |
| unsigned int | 4 | 0 to 4294967295 |
| signed int | 4 | -2147483648 to 2147483647 |
| short int | 2 | -32768 to 32767 |
| unsigned short int | 2 | 0 to 65,535 |
| signed short int | 2 | -32768 to 32767 |
| long int | 4 | -2,147,483,647 to 2,147,483,647 |
| signed long int | 4 | same as long int |
| unsigned long int | 4 | 0 to 4,294,967,295 |
| float | 4 | +/- 3.4e +/- 38 (~7 digits) |
| double | 8 | +/- 1.7e +/- 308 (~15 digits) |
| long double | 8 | +/- 1.7e +/- 308 (~15 digits) |
| bool | 1 | true or false |
| wchar_t | 2 | 1 wide character |
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