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Limits is the header file in c++ which consists of numeric_limits class whereas climits is the header file consisting of the min and max values of various data types only.
Limits can be used whereever one wants to use climits, however the opposite of this is not true.
Hence when is it advised to use climits and when limits?
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The header files “limits. h” exists in C language while <climits> in C++ language. Several macros are defined in these header files. The limits specify that variable cannot store values beyond the limits. Some macros in “limits.h” or <climits> header file are as follows.
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. CHAR_MIN:- Minimum value for an object of type char.
The limits. h header determines various properties of the various variable types. The macros defined in this header, limits the values of various variable types like char, int and long.
climits/limits.h is part of the programming language C. If you are writing in C then you use that. C++ has this because it inherits the standard library from C.
limits serves the same purpose, but via a modernized C++ interface. If you are wrting C++, then always use this. There is no reason to use the C header.
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