What would you like to do?

What is a null macro what is the difference between a null pointer and a null macro?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

NULL Macro is simply what is defined as 0 in a macro provided by the library

Null pointer is a pointer which has 0 or NULL value stored and points to nowhwere still it points to 0x00 i.e. the first memory location of the OS

Null pointer != Uninitialized pointer because an uninitialised pointer can point anywhere in the memory location ...but a NULL pointer surely points to no where(but still behind the scene we can say that it only points to 0x00). Never we can retrive a Null pointer location using th"&" operator..neither will malloc/calloc return NULL IF THERE IS SPACE IN THE MEMORY. NULL pointer is unique !!
+ 6 others found this useful
Thanks for the feedback!

What is null allele?

A null allele is a mutant copy of gene that completely lacks that gene's normal function. This can be the result of the complete absence of the gene product (protein, RNA) at

What are the difference between null and undefined in Javascript?

undefined means a variable has been declared but has not yet  been assigned a value. On the other hand, null is an  assignment value. It can be assigned to a variable as a 

What is a NULL Pointer?

A pointer variable which is declared but not initialized is called a NULL POINTER. ex: int *p;     Please don't use the above. A NULL pointer is a specific value

What is the difference between Uninitialized pointers and Null Pointers?

Unitialized pointer may contain any value, so if you should use them, the results are unpredictable; NULL value on the other hands explicitly means that the pointer does not p

What is the size of null pointer?

A NULL pointer has the same size as a non NULL pointer. NULL means that the pointer has been set to the NULL value that is usually zero (0) but the NULL value is at the digres

What does null stand for?

null does not stand for anything, it simply is a computer term for a non-value

What is null pointer and is it same as an uninitialized pointer?

An uninitialized pointer is a pointer that has not been assigned a value; it's uninitialized. The value of an uninitialized pointer is undefined (it could be anything). A

What is the null matrix?

    the matrix whose entries are all 0  

What is Difference between null macro and null pointer?

Using a NULL macro to make C portable  I'll assume that you're asking your question for C type language programming. A NULL pointer is a pointer that's guarnteed to point to

What does null mean in banking terms?

Null defines the value in a banking account as zero, no value. Zero  or null are used to state the same idea on banking and investment  documents.

What is null point?

Null point is the point in which the gravitational force between moon and the earth is equal in opposite direction. So there is no effect of any force.

What does null mean?

The word "null" means "nothing" and is usually used in a mathematical sense of meaning "zero." In computer data situations it can mean a field that contains no data, not even

What is offset null in lm741?

When using the LM741, one of the inputs will have a bias (usually non-inverting input), which means the output can never be 0 V. If a 0 V output is needed, you need to offset

What is the difference between null array and an empty array?

There is no null array as such. However, a pointer to an array may be nullified (pointing to zero) before memory is allocated to it, or after that memory is released. But the

Difference between void pointer and null pointer?

A Null pointer has the value 0. void pointer is a generic pointer introduced by ANSI. Before ANSI, char pointers are used as generic pointer. Generic pointer can hold the addr