What is the difference between NULL and NUL?

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Arunava Chatterjee

Professional Java Trainer

Basically NULL is predefined variable we can't defined value of NULL and NUL is defined by user its values changed by user time to time according its requirement.
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C, C++ Trainer

NUL is the notation for an ASCII character code 0 NULL is a macro defined in stddef for the null pointer.
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Difference between NULL and NUL in C. NULL is a macro defined in stddef.h for the null pointer. NUL is the name of the first character in the ASCII character set. It corresponds to a zero value.
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