What is the concept of null in c++?

6 months ago

1 minute

In C++, the nullptr keyword is commonly used to represent a null pointer or null object. Introduced in C++11, nullptr is a special type of literal value used specifically to represent a null pointer. In earlier versions of C++, the NULL macro was typically used to represent a null pointer. However, nullptr is more explicit and type-safe, allowing for implicit conversion to any pointer type, whereas NULL may have some issues with type mismatch.

Using nullptr can prevent some issues caused by null pointers, such as crashes from null pointer dereferencing. Therefore, in modern C++ programming, it is recommended to use nullptr to represent null pointers.