In this article, we will discuss size_t type which is an unsigned integer memsize type which can hold objects of any type having maximum size and is obtained from C or C++ standard library which is a returned type of sizeof operator along with different string functions.What is the use of size_t in C?
size_t data type in C. 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.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.Why do we need size_t andptrdiff_T in C++?
The types size_t and ptrdiff_t were created to perform correct address arithmetic. It had been assumed for a long time that the size of int coincides with the size of a computer word (microprocessor's capacity) and it can be used as indexes to store sizes of objects or pointers.