null pointer


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null pointer

In programming, a reference to zero. It may be the starting value in the pointer, or may be used as the response to an unsuccessful search function.
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Null pointer checks can be performed on array base pointers and other pointers while computing the safe region.
Adding to the front of the list requires using a NULL pointer, which is the value used to initialize position "pHere".
Suppose you want to make sure that a program avoids dereferencing a null pointer by always checking before dereferencing.