C Preprocessor Directive Complete with example | C Programs IPU Btech Programming in C| BCA |

C Preprocessor Directives – Basics, #define, #ifdef, #ifndef, #if–#else, # and ## with Examples | IPU btech | In this lecture, we explain Preprocessor Directives in C programming starting from the basics of the C preprocessor. The session covers important directives such as #define, #ifdef, #ifndef, #if, #else, #, and ##, along with clear syntax and practical examples. This topic is very important for students of BCA, BSc CS, BTech, Diploma, and 11th–12th Computer Science, and is frequently asked in exams and interviews. By the end of this lecture, students will understand how the preprocessor works and how conditional compilation and macros are used in real programs. Topics Covered What is a Preprocessor in C Basics of Preprocessor Directives #define (Macros) #ifdef and #ifndef #if – #else – #endif # (Stringizing Operator) ## (Token Pasting Operator) Examples of each directive Exam-oriented explanation C preprocessor directives preprocessor in c #define in c #ifdef and #ifndef in c #if else endif in c stringizing operator in c token pasting operator in c macros in c programming c programming basics conditional compilation in c #CProgramming #PreprocessorDirectives #DefineInC #Ifdef #Ifndef #ConditionalCompilation #MacrosInC #BCA #BTech #ComputerScience #jischolars Join this channel to get access to perks: https://www.youtube.com/channel/UCh57GP3w8qOkYy6v-737syQ/join