Data types
Data Types
- Primary (or Built-in or Fundamental) data type: Integer / Character / Boolean / Floating Point / Double Floating Point / Void / Wide Character
- Derived data types: Function / Array / Pointer / Reference
- User defined data types: Class / Structure / Union / Enum / Typedef
Datatype Modifiers
- Signed: Integer / Character / Long - Prefix
- Unsigned: Integer / Character / Short - Prefix
- Long: Integer / Double
- Short: Integer
Summary
| Data Type | keyword | Size(in bytes) | Range |
| Short Integer | short int | 2 | -32,768 to 32,767 |
| Unsigned Short Integer | unsigned short int | 2 | 0 to 65,535 |
| Unsigned Integer | unsigned int | 4 | 0 to 4,294,967,295 |
| Integer | int | 4 | -2,147,483,648 to 2,147,483,647 |
| Long Integer | long int | 4 | -2,147,483,648 to 2,147,483,647 |
| Unsigned Long Integer | unsigned long int | 4 | 0 to 4,294,967,295 |
| Long long Integer | long long int | 8 | -(2^63) to (2^63)-1 |
| Unsigned Long Long Integer | unsigned long long int | 2 | 0 to 18,446,744,073,709,551,615 |
| Signed Character | signed char | 1 | -128 to 127 |
| Unsigned Character | unsigned char | 1 | 0 to 255 |
| Float | float | 4 | - |
| Double | double | 8 | - |
| Long Double | long double | 12 | - |
| Wide Character | wchar_t | 2 or 4 | 1 wide character |
Macro Constants
| Name | Description |
| CHAR_MIN, CHAR_MAX | Minimum and Maximum value for an object of type char |
| SCHAR_MIN, SCHAR_MAX | Minimum and Maximum value for an object of type Signed char |
| UCHAR_MAX | Maximum value for an object of type Unsigned char |
| CHAR_BIT | Number of bits in a char object |
| MB_LEN_MAX | Maximum number of bytes in a multi-byte character |
| SHRT_MIN, SHRT_MAX | Minimum and Maximum value for an object of type short int |
| USHRT_MAX | Maximum value for an object of type Unsigned short int |
| INT_MIN, INT_MAX | Minimum and Maximum value for an object of type int |
| UINT_MAX | Maximum value for an object of type Unsigned int |
| LONG_MIN, LONG_MAX | Minimum and Maximum value for an object of type long int |
| ULONG_MAX | Maximum value for an object of type Unsigned long int |
| LLONG_MIN, LLONG_MAX | Minimum and Maximum value for an object of type long long int |
| ULLONG_MAX | Maximum value for an object of type Unsigned long long int |