Tutorial references


Tutorial references


Compile and Run

Rules of C program

C is case sensitive programming language, it means variable name "MYDATA" is different from a variable name "mydata".

Write all keywords are in lowercase.

Keywords cannot be used for any other purpose (like variable names or function names).

Every C program statements must end with a ;. Thus ; works as a statement terminator.

First character of variable must be an alphabet or underscore.

No any special character allowed in variable name but underscore(_) is allowed in variable name.

Blank space is not allowed in variable name.

Variable must be declared before it is used in the program.

Do not use keyword for variable name and function name.

Extension of C program file is ".c".

First compile your program if program has not any error then run it.

Structure of C program

pre-processor directives
global variable declarations
local variable deceleration
statement sequences
function invoking

A simple program

first start turbo c++.

Type the below program.

Press f2 for save.

save file with .c extension. Example "myfile.c".


#include <stdio.h>
#include <conio.h>
void main(){


A compiler is a program that translates human-readable source code into computer-executable machine code.

Press Alt + f9 for compile.

If no any error in your program then you can run it.


Press Ctrl + f9 for run

When your program successfully execute then you can see output.

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