Difference between nul and NULL

Question

Hi What is difference between nul and NULL in C language? Thanks.

Hemant Kumar · Answer

NULL is a macro defined in for the null pointer. NUL is the name of the first character in the ASCII character set. It corresponds to a zero value. There?s no standard macro NUL in C but some people like to define it. The digit 0 corresponds to a value of 80 decimal. Don?t confuse the digit 0 with the value of ?? (NUL)! NULL can be defined as ((void*)0) NUL as ??.