Writing First C program

Writing your first C program is an exciting step towards becoming a programmer. Let's walk through the process of creating a simple "Hello, World!" program in C:

Open VS code and follow the instructions as followed.

 

1. Crete a new file and named it as "hello.c", remember c as extension.
2. Write the code in the file
   

   #include <stdio.h>
   
   int main() {
     printf("Hello World!");
     return 0;
   }

3. Save the file and open terminal.
4. write "gcc hello.c"
5. it will create a new file, run the new file directly as "./newfilename", in our case it is a.out
6. Volla, you can see the output "Hello World!" in your terminal

 

Lets understand the structure

• #include <stdio.h>: This line includes the standard input-output library, which provides functions like printf for displaying output.

• int main(): This is the starting point of the program. The main function is where the program's execution begins.

• { and }: These curly braces define a block of code that belongs to the main function.

• printf("Hello, World!\n");: This line uses the printf function to display "Hello, World!" on the screen. The \n represents a newline character, which moves the cursor to the next line after printing.

• return 0;: This line indicates that the program has completed successfully and returns a status code of 0 to the operating system.