what is the value of null in c
Null pointer In C, two null pointers of any type are guaranteed to compare equal.[1] The preprocessor macro NULL is defined as an implementation-defined null pointer constant,[2] which in C99 can be portably expressed as the integer value 0 converted implicitly or explicitly to the type void* (pointer to void).[3] The C standard does not say that the null pointer is the same as the pointer to memory addressÂ 0, though that may be the case in practice. Dereferencing a null pointer is undefined behavior in C, and a conforming implementation is allowed to assume that any pointer that is dereferenced is not null.
Escape sequences in C In C, all escape sequences consist of two or more characters, the first of which is the backslash, \ (called the "Escape character"); the remaining characters determine the interpretation of the escape sequence. For example, \n is an escape sequence that denotes a newline character. The remainder of this article focuses on C; other programming languages are likely to have different syntax and semantics.