Basic Variables

As a programmer, you will frequently want your program to "remember" a value. For example, if your program requests a value from the user, or if it calculates a value, you will want to remember it somewhere so you can use it later.
This post will show you the different types of variables (Reminder:)that are available in C. The four basic variables are int(integers,float (decimals),double (long numbers)and char (characters).
The following sample program will show you how they could be used;

#include stdio.h

int main(void)
{
int integer;
float decimal;
double longnumber;
char character;

integer = 9;
decimal = 5.6;
longnumber = 56489;
character = 'G';

return 0;
}

Now lets learn to display the contents of the different variable types.
Heres a sample program;

#include stdio.h

int main(void)
{
int integer = 9;
float decimal = 5.6;
double longnumber = 564897;
char character = 'G';

printf("The contents of the variable integer are %d\n", integer);
printf("The contents of the variable decimal are %f\n", decimal);
printf("The contents of the variable longnumber are %f\n", longnumber);
printf("The contents of the variable character are %c\n", character);

return 0;
}

The first four lines of the program declare four different variable types.The next four lines show how to display each variables content to the screen. In a standard printf statement, you use the % operator and then the proper format specifier (%d is used for integers, %f for floats and double, and %c for a character).\n is the newline character (include it anywhere in the printf statement to have cause the program to return at that point. After you have put the proper format specifier in the place where you want the variables contents displayed, then after the quotations that end what is displayed to the screen, you put a comma, then the name of the variable that is to be displayed to the screen at that point.If you want to use multiple variables in one printf statement, then you type it like so:
printf("Variable one is %d, Variable two is %d\n", variable_one, variable_two);