Variables

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Variables are simply where you store data. A variable has a name and data type.

Data Types

Different Data Types in C
int	integer
char	character
float	floating point value; decimal
double	double precision floating point value

I only listed the basic but this would be enough to make a simple program.

So yeah, basically data types exist so that the compiler will know what are you trying to store in a specific variable. Error will be raised when you try to store a character in an int variable.

Variable Declaration

Variable declaration consists of the data type and the variable name. Of course, every variable must have a unique name. You have to declare the variable first before using it.


Examples:

1 2	int age; char gender;

The value of the variables above is null after their declaration but you can also define a default value like:

1 2 3 4 5 6 7 8 9 10

/* A variable to determine whether a game is already over. And of * course, it has to be false at the start of the game. * * By the way, this is the correct way of writing multiple-lined * comments in C and in many more programming languages. */ int isGameOver = 0; // I was kind of feminist, you know. char gender = 'F';

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