C Tutorials
Basics in C
Introduction of C
Keywords in C
Data Types in C
First Program in C
Add Two Numbers in C
Input from User in C
String Input from User in C
Decision Making
If Statement in C
If and Else Statement in C
AND Operator in If Statement in C
Switch Statement in C
Loops
While Loop in C
While Loop User Input in C
Triangle using While Loop in C
For Loop in C
For Loop using Continue in C
Do While Loop in C
Triangle using Do While Loop in C
Functions
Function in C
Calling Function inside Function in C
Passing Arguments to Function in C
Passing String Arguments to Function in C
Passing Arguments to Function and Return in C
Calling Function of .h File in C
Arrays
Array in C
String Array in C
User Input in Array in C
Find Min and Max Number in Array in C
Two Dimensional Array in C
User Input using Gets and Puts in C
Pointers
Pointers in C
Working with Pointers in C
String Functions in C
Structure
Structure in C
Passing Arguments in Structure in C
Passing Arguments and Return in Structure in C
Constructor in Structure in C
Data and Time
Date and Time in C
File Handling
Read and Write Text File in C
Deleting File in C
Create and Delete Directory in C
File Opening Modes in C
More Examples
Encryption and Decryption in C
Open Application in C
Defining Startup and Exit in C
Working with Define in C
View Address of Variable in C
Shut Down Computer in C
Library Functions
Precedence Table in C
Arithmetic Functions in C
IO Functions in C
Disk IO Functions in C
Basic Data Types Meanings in C
Printf Format Specifiers in C
Library Header Files in C

Data Types in C

Each variable has an associated data type in C programming. C language supports both signed and unsigned literals and requires different amounts of memory.

Basic Data Types

Type Specifier Description
int Stores an integer number
long int Stores a long integer numbers
unsigned int Stores an unsigned integer numbers
char Store a character
unsigned char Store a unsigned character
float Stores a floating number
Double Stores a double floating number
long double Stores a long double floating number

Variable

Variable is a location in computer memory where data is temporary stored OR saved.

How to use

e.g: int RollNumber = 13;

Explanation
int is Data Type of variable
RollNumber is Name of variable
13 is Value of variable

Another Example

e.g: float floatingVariable = 5.67;

Explanation
float is Data Type of variable
floatingVariable is Name of variable
5.67 is Value of variable
Difference between variable Declaration, Definition and Initialization
Variable Declaration:

int MyVariable;

Variable Definition:

MyVariable = 56;

Variable Initialization:

int MyVariable = 56;

Printf Format Specifiers
Specifier Use
%c character
%u unsigned decimal
%n Nothing printed
%d decimal
%f floating number
%i integer
%X Unsigned hexadecimal
%p Pointer address
%o Octal number
%s string
Printf Characters
Characters Use for
\t Tab
\v Vertical tab
\b Backspace
\n Goto new line
\\ Backslash
\a Audible alert
\f form feed
\r Carriage return
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