Web Reference: The C standard defines that 0 cast to the type void * is both a null pointer and a null pointer constant. Additionally, to help readability, the macro NULL is provided in the header file stddef.h. Dec 27, 2023 · In this comprehensive guide, we‘ll dive deep into all things NULL – from its pivotal role in C programming to common bugs and best practices for usage. Whether you‘re new to C or an experienced developer, you‘ll gain an expert-level understanding of the power of NULL in C and other languages. Jan 10, 2025 · Following are some most common uses of the NULL pointer in C: To initialize a pointer variable when that pointer variable hasn't been assigned any valid memory address yet. To check for a null pointer before accessing any pointer variable.
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