# C and C++ Integer Limits

**Microsoft Specific**

The limits for integer types in C and C++ are listed in the following table. These limits are defined in the C standard header file `<limits.h>`

. The C++ Standard Library header `<limits>`

includes `<climits>`

, which includes `<limits.h>`

.

Microsoft C also permits the declaration of sized integer variables, which are integral types of size 8-, 16-, 32- or 64-bits. For more information on sized integers in C, see Sized Integer Types.

## Limits on Integer Constants

Constant |
Meaning | Value |
---|---|---|

CHAR_BIT |
Number of bits in the smallest variable that is not a bit field. | 8 |

SCHAR_MIN |
Minimum value for a variable of type .`signed char` |
-128 |

SCHAR_MAX |
Maximum value for a variable of type .`signed char` |
127 |

UCHAR_MAX |
Maximum value for a variable of type .`unsigned char` |
255 (0xff) |

CHAR_MIN |
Minimum value for a variable of type .`char` |
-128; 0 if /J option used |

CHAR_MAX |
Maximum value for a variable of type .`char` |
127; 255 if /J option used |

MB_LEN_MAX |
Maximum number of bytes in a multicharacter constant. | 5 |

SHRT_MIN |
Minimum value for a variable of type .`short` |
-32768 |

SHRT_MAX |
Maximum value for a variable of type .`short` |
32767 |

USHRT_MAX |
Maximum value for a variable of type .`unsigned short` |
65535 (0xffff) |

INT_MIN |
Minimum value for a variable of type .`int` |
-2147483647 - 1 |

INT_MAX |
Maximum value for a variable of type .`int` |
2147483647 |

UINT_MAX |
Maximum value for a variable of type .`unsigned int` |
4294967295 (0xffffffff) |

LONG_MIN |
Minimum value for a variable of type .`long` |
-2147483647 - 1 |

LONG_MAX |
Maximum value for a variable of type .`long` |
2147483647 |

ULONG_MAX |
Maximum value for a variable of type .`unsigned long` |
4294967295 (0xffffffff) |

LLONG_MIN |
Minimum value for a variable of type .`long long` |
-9,223,372,036,854,775,807 - 1 |

LLONG_MAX |
Maximum value for a variable of type .`long long` |
9,223,372,036,854,775,807 |

ULLONG_MAX |
Maximum value for a variable of type .`unsigned long long` |
18,446,744,073,709,551,615 (0xffffffffffffffff) |

If a value exceeds the largest integer representation, the Microsoft compiler generates an error.

**END Microsoft Specific**

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