What is the size_t data type in C? size_t is an unsigned integral data type which is defined in various header files such as: It’s a type which is used to represent the size of objects in bytes and is therefore used as the return type by the sizeof operator.What is size_t in C++ with example?
In general, size_t is the unsigned type which means it can never be negative which is also used for array indexing and counting, this size_t is unsigned mem-size-type which is defined by the standard library of C or C++ programming languages.Why size_T type is never negative in C?
The size_t data type is never negative. Therefore many C library functions like malloc, memcpy and strlen declare their arguments and return type as size_t. For instance, // Declaration of various standard library functions. // allocated which is guaranteed to be non-negative. // n must be non-negative integer.What is sizesize_Tis in C++?
size_tis an unsigned data type defined by several C/C++ standards, e.g. the C99 ISO/IEC 9899 standard, that is defined in stddef.h.1 It can be further imported by inclusion of stdlib.h as this file internally sub includes stddef.h. This type is used to represent the size of an object.