The many meanings of NULLThis tip submitted by Rajat Kochhar on 2005-05-22 08:12:00. It has been viewed 54004 times.
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There are three uses of the word null:
1. A null pointer is a pointer which doesn't point anywhere.
2. A NULL macro is used to represent the null pointer in the source code. It has a value of 0 associated with it.
3. The ASCII NULL character has all its bits as 0 but doesn't have any relationship with the null pointer!
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