Declare Variables and Assign Values

           A variable is a named memory location that can hold various values. Only the most trivial C programs do not include variables. In C, unlike some computer languages, all variables must be declared before they can be used. A variables's declaration serves one important purpose.

What type of variable is being used ?  

C support five (5) types of different data types.

       Type                                                          Keyword

character data                                                      char
signed whole numbers                                            int
floating-point numbers                                           float
double-precision floating-point number                    double
valueless                                                             void


Example:

             #include <stdio.h>
                int main(void)

          {
               int number;
               number = 120;
               printf("\n Your value is: %d \n", number);
               return 0;

           }

[N.T = Declares number to be an integer variable. ]

 To display the value of number, the program uses this statement:

            printf("\n Your value is: %d \n", number);

Output of the code