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what is the difference between NULL('\0') and 0?
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What is the difference b/w '\0' and NULL?
The first is the representation for the null character, i.e.,
a character with value zero. It is used as a string
terminator in C.
It is actually an "escape sequence" with an octal zero.
The second is a macro that resolves to a null pointer value.
In C source
code a literal zero is also converted into a null pointer
constant when
it occurs in a pointer context.
The first expression is of type int while the second is of a
pointer
type.
> In which case It is useful?
Use '\0' to terminate strings and NULL to initialise
pointers and set
them to a "safe" value after they have been used.
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