Data Types

Some steps are involve in case sensitive 

1. The first word should be alphabetic.
2. First value of variable cannot be numeric.
3. Cannot use special characters.
4. Cannot use blank spaces.
5. Cannot use keywords or reserve words while declaring a variable.
6. we can use only underscore sign while declaring a variable.                                  These steps use only in programing to write a program. The first step to to start a program will always be    #include   This is always remain first step. Std means in this line is Standard and io I is used for INPUT and O is used for OUTPUT. But H is used to represent Header in system and used before compiling in this step. If we want to include a mathematical solution or a methematic equation or math formulas or math derivatives or math integration and any math operation then we have to add a step always on second of this program. The will be written in this form #include. After this  next step will be main body and which we written first were preprocessive and now the next step will be main body. The start of this step will be in a curly bracket which will be seemed as { ..............}. The statement or functions can be written in these steps and this ca be in differents ways like in counting forms or like alphabetibally maners. After write its main body we can easily make a program with close this by using opposite side of curly bracket. this is an example in commons      {                                                                                                                            statement 1                                                                                                    statement 2                                                                                                    statement 3                                                                                                    statement 4                                                                                                                     }.  keep in mind we will always wright program in these curly brackets also start and also end only with these brackets. Otherwise compiler will give error and program will be stop. But if we do these puntually then program will easily execute.