What Are The Macros For The Integer Constants In Modern C++

In C++ programming, there are macros for the fixed-width integer type that allow you to obtain minimum and maximum possible values. In this post, we explain these macros for integer constants in modern C++.

What are the macros for minimum signed integer constants in modern C++?

Here are the macros for minimum signed integer constants in general form in C++:

Integer Constant	Description
INT8_MIN	min. value of 8 bits signed integer type
INT16_MIN	min. value of 16 bits signed integer type
INT32_MIN	min. value of 32 bits signed integer type
INT64_MIN	min. value of 64 bits signed integer type

Here are the macros for minimum signed integer constants in fastest form:

Integer Constant	Description
INT_FAST8_MIN	min. value of 8 bits fast signed integer type
INT_FAST16_MIN	min. value of 16 bits fast signed integer type
INT_FAST32_MIN	min. value of 32 bits fast signed integer type
INT_FAST64_MIN	min. value of 64 bits fast signed integer type

Here are the macros for minimum signed integer constants in smallest form:

Integer Constant	Description
INT_LEAST8_MIN	min. value of 8 bits fast signed integer type
INT_LEAST16_MIN	min. value of 16 bits fast signed integer type
INT_LEAST32_MIN	min. value of 32 bits fast signed integer type
INT_LEAST64_MIN	min. value of 64 bits fast signed integer type

Integer Constant	Description
INTMAX_MIN	min. value of std::intmax_t

Integer Constant	Description
INTPTR_MIN	min. value of  std::intptr_t

What are the macros for the maximum signed integer constants in modern C++?

Here are the macros for maximum signed integer constants in general form in C++:

Integer Constant	Description
INT8_MAX	max. value of 8 bits signed integer type
INT16_MAX	max. value of 16 bits signed integer type
INT32_MAX	max. value of 32 bits signed integer type
INT64_MAX	max. value of 64 bits signed integer type

Here are the macros for maximum signed integer constants in fastest form:

Integer Constant	Description
INT_FAST8_MAX	max. value of 8 bits fast signed integer type
INT_FAST16_MAX	max. value of 16 bits fast signed integer type
INT_FAST32_MAX	max. value of 32 bits fast signed integer type
INT_FAST64_MAX	max. value of 64 bits fast signed integer type

Here are the macros for maximum signed integer constants in smallest form:

Integer Constant	Description
INT_LEAST8_MAX	max. value of 8 bits fast signed integer type
INT_LEAST16_MAX	max. value of 16 bits fast signed integer type
INT_LEAST32_MAX	max. value of 32 bits fast signed integer type
INT_LEAST64_MAX	max. value of 64 bits fast signed integer type

Integer Constant	Description
INTMAX_MAX	max. value of std::intmax_t

Integer Constant	Description
INTPTR_MAX	max. value of  std::intptr_t

What are the macros for the minimum unsigned integer constants in modern C++?

Here are the macros for the minimum unsigned integer constants in general form in C++:

Integer Constant	Description
UINT8_MIN	min. value of 8 bits unsigned integer type
UINT16_MIN	min. value of 16 bits unsigned integer type
UINT32_MIN	min. value of 32 bits unsigned integer type
UINT64_MIN	min. value of 64 bits unsigned integer type

Here are the macros for minimum unsigned integer constants in fastest form:

Integer Constant	Description
UINT_FAST8_MIN	min. value of 8 bits fast unsigned integer type
UINT_FAST16_MIN	min. value of 16 bits fast unsigned integer type
UINT_FAST32_MIN	min. value of 32 bits fast unsigned integer type
UINT_FAST64_MIN	min. value of 64 bits fast unsigned integer type

Here are the macros for minimum unsigned integer constants in smallest form:

Integer Constant	Description
UINT_LEAST8_MIN	min. value of 8 bits fast unsigned integer type
UINT_LEAST16_MIN	min. value of 16 bits fast unsigned integer type
UINT_LEAST32_MIN	min. value of 32 bits fast unsigned integer type
UINT_LEAST64_MIN	min. value of 64 bits fast unsigned integer type

Integer Constant	Description
UINTMAX_MIN	min. value of std::uintmax_t

Integer Constant	Description
UINTPTR_MIN	min. value of  std::uintptr_t

What are the macros for the maximum unsigned integer constants in modern C++?+

Here are the macros for the maximum signed integer constants in general form in C++.

Integer Constant	Description
UINT8_MAX	max. value of 8 bits unsigned integer type
UINT16_MAX	max. value of 16 bits unsigned integer type
UINT32_MAX	max. value of 32 bits unsigned integer type
UINT64_MAX	max. value of 64 bits unsigned integer type

Here are the macros for the maximum unsigned integer constants in fastest form:

Integer Constant	Description
UINT_FAST8_MAX	max. value of 8 bits fast unsigned integer type
UINT_FAST16_MAX	max. value of 16 bits fast unsigned integer type
UINT_FAST32_MAX	max. value of 32 bits fast unsigned integer type
UINT_FAST64_MAX	max. value of 64 bits fast unsigned integer type

Here are the macros for maximum unsigned integer constants in smallest form:

Integer Constant	Description
UINT_LEAST8_MAX	max. value of 8 bits fast unsigned integer type
UINT_LEAST16_MAX	max. value of 16 bits fast unsigned integer type
UINT_LEAST32_MAX	max. value of 32 bits fast unsigned integer type
UINT_LEAST64_MAX	max. value of 64 bits fast unsigned integer type

Integer Constant	Description
UINTMAX_MAX	max. value of std::uintmax_t

Integer Constant	Description
UINTPTR_MAX	max. value of  std::uintptr_t

If you are looking more about Declared Constants, you can follow this link: https://docwiki.embarcadero.com/RADStudio/Alexandria/en/Declared_Constants

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