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Hello World The First Program  Program     File: - Helloworld.c                    #include <stdio.h>                                 // header file                      #include <conio.h>                                 // header file                    void main() {                                         // main function with return type                                ...

  Structure Of C Program Preprocessor Directives Preprocessor directives are used to include header files, define constants, and perform other tasks before the code is compiled. Here are some common preprocessor directives: #include The #include directive is used to include header files in the program. Header files contain function prototypes, constants, and other declarations that are needed by the program. For example, the following code includes the stdio.h header file, which contains the printf function: Example:        #include <stdio.h> #define The #define directive is used to define constants in the program. Constants are values that do not change during the execution of the program. For example, the following code defines the constant PI : Example:        #define PI 3.14159 Function Declarations Function declarations tell the compiler about functions that are defined elsewhere in the program. Here are some examples...

  Introduction Of C Programming C is a widely used programming language that was developed in the early 1970s by Dennis Ritchie at Bell Labs. It has since become one of the most influential and enduring programming languages, known for its efficiency, flexibility, and portability. In this article, we will explore the syntax, advantages, and uses of the C programming language. Syntax of C:-         #include <stdio. h >                      #include <conio. h >              int  main() {              printf( "Hello World!" );              return   0 ;         } Advantages of C:- 1. Efficiency: C is known for its efficiency in terms of execution speed and memory usage. It allows low-level access to the computer's resources, making it suitable for ...