Preprocessor Directives In C

[Viren Patel]

#52897

What Are Preprocessor Directives In C?

---

[Nitesh User Do not delete]

#52902

C Preprocessor directives:

Before a C program is compiled in a compiler, the source code is prepared by a program called preprocessor. This procedure is called preprocessing.

Commands utilized in preprocessor are called preprocessor directives and they start with “#” symbol

Preprocessing directives are lines in your program that begin with ‘#’. The ‘#’ is trailed by an identifier that is the directive name. For instance, ‘#define’ is the directive that defines a macro. Whitespace is likewise permitted when the ‘#’. A preprocessing directive can’t be more than one line in typical conditions. Some directive names require arguments.

Some List of preprocessor directives :

#include
#define
#undef
#ifdef
#ifndef
#if
#else
#elif
#endif
#error
#pragma

The Preprocessor forms the source program before it is passed to the compiler. The features that preprocessor offers are known as Preprocessor Directives.

---

Regards,
Nitesh Bavishiya

[Author]

Posts