I’m gonna show you the basic types in C++ and their use
Type | Keyword |
---|---|
Boolean | bool |
Character | char |
Integer | int |
Floating point | float |
Double floating point | double |
Valueless | void |
Wide character | wchar_t |
Several of the basic types can be modified using one or more of these type modifiers:
-
signed
-
unsigned
-
short
-
long
Values that can take each type and the input of each one:
Type | Typical Bit Width | Typical Range |
---|---|---|
char | 1byte | -128 to 127 or 0 to 255 |
unsigned char | 1byte | 0 to 255 |
signed char | 1byte | -128 to 127 |
int | 4bytes | -2147483648 to 2147483647 |
unsigned int | 4bytes | 0 to 4294967295 |
signed int | 4bytes | -2147483648 to 2147483647 |
short int | 2bytes | -32768 to 32767 |
unsigned short int | Range | 0 to 65,535 |
signed short int | Range | -32768 to 32767 |
long int | 4bytes | -2,147,483,647 to 2,147,483,647 |
signed long int | 4bytes | same as long int |
unsigned long int | 4bytes | 0 to 4,294,967,295 |
float | 4bytes | +/- 3.4e +/- 38 (~7 digits) |
double | 8bytes | +/- 1.7e +/- 308 (~15 digits) |
long double | 8bytes | +/- 1.7e +/- 308 (~15 digits) |
wchar_t | 2 or 4 bytes | 1 wide character |