C++ Lesson : Variables

Just like in algebra, one of the first thing you must know in programming is how variables work. I am sure you understand, but if you don't, a variable is a letter or symbol that can represent any number. In C++, they can also represent things such as words or characters, but we will get into those later.

Lets run through the most basic types of variables:

int x;

X is now an integer so it can be negative or positive, but NOT a decimal.

double x;

X can now be negative, positive, AND a decimal.

char x;

X can now be any one character like Y or H.

char's are NOT values, so you CANNOT do any sort of mathematical operation with them, like this:

char x = 10;

char y = 5;

x + y = z;

z = 15;

WRONG!!!

but you CAN do this:

char y;

char x = 'h';

y = x;

Now y = "h" because x = "h" and we said y = x;

But now we need to understand how to assign values or characters to these variable types!

For int:

int x;
x = 5;

OR

int x = 5;


For double:

double x;
x = 1.5;

OR

double x = 1.5;


For char:

char x;
x = 'h';

OR

char x = 'h';

Thanks for reading and please try to refer this blog to others via the internet or whatever!