Programming

What's Programming?

Programming is our way of building applications and systems by converting text language into a language the machine can understand

Let's assume we're using the C language:

hello.c

    #include <stdio.h>

    int main() {
        printf("Hello world\n");

        return 0; // Process return code -> 0 means no errors
    }

Linux:

    gcc hello.c -o hello

Linux:

    ./hello

Output:

    user@computer$ ./hello
    Hello world
    user@computer$

    gcc hello.c -o hello

    #include <stdio.h> // stdio.h is the referenced header file

Now it expands any macros you defined with #define (none in our case)
Removes any comments we've made to our code (like the one I made with the return code)
Converts the code to Assembly code that match the compiling computer architecture (x86 / ARM)
Converts that Assembly code into binary (bits and bytes)
Links calls to external functions mentioned in the header files, in our case:

    printf();

    hello