Extended Integer Types: __int8, __int16, __int32, __int64

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Keyword Extensions

Description

You can specify the size for integer types (number of bits occupied in memory).

You must use the appropriate suffix (i16, ui32, and so on) using extended integer constants.

Extended integer types

Type	Suffix in constants	Example	Storage
__int8	i8	__int8 c = 127i8;	8 bits
unsigned __int8	ui8	unsigned __int8 c = 240ui8;	8 bits
__int16	i16	__int16 s = 32767i16;	16 bits
unsigned __int16	ui16	unsigned __int16 s = 64532ui16;	16 bits
__int32	i32	__int32 i = 123456789i32;	32 bits
unsigned __int32	ui32	unsigned __int32 i = 223456789ui32;	32 bits
__int64	i64	__int64 big = 12345654321i64;	64 bits
unsigned __int64	ui64	unsigned __int64 hugeInt = 1234567887654321ui64;	64 bits

See Also

• Constants
• Integer Constants
• Floating Point Constants
• Character Constants
• The Three char Types
• Escape Sequences
• Wide-character And Multi-character Constants
• String Constants
• Enumeration Constants
• Constants And Internal Representation
• Internal Representation Of Numerical Types
• Constant Expressions