where is size_t defined?

where is size_t defined?
size_t is a base unsigned integer memsize-type defined in the standard library of C/C++ languages. This type is described in the header file stddef. h for C and in the file cstddef for C++. Types defined by the header file stddef.
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How is Size_t defined?
The datatype size_t is unsigned integral type. It represents the size of any object in bytes and returned by sizeof operator. It is used for array indexing and counting. It can never be negative. Nov 5, 2018
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What is the Size_t in C++?
Unsigned integral type. Alias of one of the fundamental unsigned integer types. It is a type able to represent the size of any object in bytes: size_t is the type returned by the sizeof operator and is widely used in the standard library to represent sizes and counts.
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Where is Off_t defined?
This is a data type defined in the sys/types. h header file (of fundamental type unsigned long) and is used to measure the file offset in bytes from the beginning of the file.
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Why is Size_t unsigned?
size_t is unsigned because negative sizes make no sense. A reason for making index types unsigned is for symmetry with C and C++'s preference for half-open intervals. And if your index types are going to be unsigned, then it's convenient to also have your size type unsigned. Apr 16, 2012
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