| 11. | In C and C + +, 0 is sometimes used to represent the null pointer.
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| 12. | Fixes for potential VCS commit logs ( including explicit assignments of NULL pointer values ).
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| 13. | It might compare equal to other, valid pointers; or it might compare equal to null pointers.
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| 14. | C + + didn't adopt the same behavior, allowing only 0 as a null pointer constant.
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| 15. | Null pointers have different semantics than null values.
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| 16. | In conditional contexts, null pointer values evaluate to false, while all other pointer values evaluate to true.
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| 17. | It is guaranteed that argc is non-negative and that argv [ argc ] is a null pointer.
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| 18. | Here, the programmer is aware that malloc will return a NULL pointer if memory is not allocated.
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| 19. | The system is designed to be memory safe, and it does not permit null pointers or dangling pointers.
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| 20. | In contrast, null pointers / sentinels provide only a finite number of tagged values distinct from valid pointers.
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