Day 9💻

C Quickstart

Let's create our first C file.

Open Codeblocks and go to File > New > Empty File.

Write the following C code and save the file as myfirstprogram.c (File > Save File as):

myfirstprogram.c

#include <stdio.h>

int main() {

 printf("Hello World!");

  return 0;

} 

Don't worry if you don't understand the code above - we will discuss it in detail in later chapters. For now, focus on how to run the code.

In Codeblocks, it should look like this:

Then, go to Build > Build and Run to run (execute) the program. The result will look something to this:

Hello World!


Process returned 0 (0x0) execution time : 0.011 s


Press any key to continue.

Congratulations! You have now written and executed your first C program.

Learning C At W3Schools

When learning C at W3Schools.com, you can use our "Try it Yourself" tool, which shows both the code and the result. It is used to write, run, and test code right in your browser:

myfirstprogram.c

Code:

#include <stdio.h>

int main() {

 printf("Hello World!");

  return 0;

}