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Hello guys, welcome to my blog, I'll be taking you through an introduction to programming using C language.
I'll be doing it on my phone, its my assumption we all have access to a smartphone, whether you are computer or phone don't freak out, the codes are just the same.
Am using cppdroid android app to do the coding, to download cppdroid click here.
Lesson 1: My first program (Hello world!)
#include <stdio.h>
main()
{
printf("Hello world!");
return 0;
}
Every C program contains a function called main. This is the start point of the program.
#include<stdio.h> allows the program to interact with the screen, keyboard and file
system of your computer. You will find it at the beginning of almost every C program.
main() declares the start of the function, while the two curly brackets show the start
and finish of the function. Curly brackets in C are used to group statements together as
in a function, or in the body of a loop. Such a grouping is known as a compound
statement or a block.
printf("This is a C program \n"); prints the words on the screen. The text
to be printed is enclosed in double quotes. The \n at the end of the text tells the
program to print a new line as part of the output.
Most C programs are written in lower case letters. You will usually find upper case
letters used in preprocessor definitions (which will be discussed later) or inside quotes
as parts of character strings.
C is case sensitive, that is, it recognises a lower case letter and it's upper case
equivalent as being different.
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