C Programming Lesson - Data Types in C Language
By rajkishor09
A programming language is proposed to help programmer to process certain kinds of data and to provide useful output. The task of data processing is accomplished by executing series of commands called program.A program usually contains different types of data types (integer, float, character etc.) to store the values being used in the program along with some library function and user defined function (UDF) to process that stored data. C language is rich of data types and library function. A C programmer has to employ proper data type as per his/her requirement.
C has different data types for different types of data and can be broadly classified as :
- Primary data types
- Secondary data types
Primary data types consist following data types.
Data Types in C
Integer types:
Integers are whole numbers with a range of values, range of values are machine dependent. Generally an integer occupies 2 bytes memory space and its value range limited to -32768 to +32767 (that is, -215 to +215-1). A signed integer use one bit for storing sign and rest 15 bits for number.
To control the range of numbers and storage space, C has three classes of integer storage namely short int, int and long int. All three data types have signed and unsigned forms. A short int requires half the amount of storage than normal integer. Unlike signed integer, unsigned integers are always positive and use all the bits for the magnitude of the number. Therefore the range of an unsigned integer will be from 0 to 65535. The long integers are used to declare a longer range of values and it occupies 4 bytes of storage space.
Syntax: int <variable name>; like
int num1;
short int num2;
long int num3;
Example: 5, 6, 100, 2500.
Integer Data Type Memory Allocation
Floating Point Types:
The float data type is used to store fractional numbers (real numbers) with 6 digits of precision. Floating point numbers are denoted by the keyword float. When the accuracy of the floating point number is insufficient, we can use the double to define the number. The double is same as float but with longer precision and takes double space (8 bytes) than float. To extend the precision further we can use long double which occupies 10 bytes of memory space.
Syntax: float <variable name>; like
float num1;
double num2;
long double num3;
Example: 9.125, 3.1254.
Floating Point Data Type Memory Allocation
Character Type:
Character type variable can hold a single character. As there are singed and unsigned int (either short or long), in the same way there are signed and unsigned chars; both occupy 1 byte each, but having different ranges. Unsigned characters have values between 0 and 255, signed characters have values from –128 to 127.
Syntax:
char <variable name>; like
char ch = ‘a’;
Example: a, b, g, S, j.
Void Type:
The void type has no values therefore we cannot declare it as variable as we did in case of integer and float.
The void data type is usually used with function to specify its type. Like in our first C program we declared “main()” as void type because it does not return any value. The concept of returning values will be discussed in detail in the C function hub.
Secondary Data Types
- Arrays in C Programming (Read it now)
An array in C language is a collection of similar data-type, means an array can hold value of a particular data type for which it has been declared. Arrays can be created from any of the C data-types int,... - Pointers in C Programming (Read it now)
In this tutorial I am going to discuss what pointer is and how to use them in our C program. Many C programming learner thinks that pointer is one of the difficult topic in C language but its not... - Structure in C Programming (Read it now)
We used variable in our C program to store value but one variable can store only single piece information (an integer can hold only one integer value) and to store similar type of values we had to declare...
User defined type declaration
C language supports a feature where user can define an identifier that characterizes an existing data type. This user defined data type identifier can later be used to declare variables. In short its purpose is to redefine the name of an existing data type.
Syntax:
typedef <type> <identifier>; like
typedef int number;
Now we can use number in lieu of int to declare integer variable. For example: “int x1” or “number x1” both statements declaring an integer variable. We have just changed the default keyword “int” to declare integer variable to “number”.
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Data Types in C, Size & Range of Data Types.
C programming tutorial links
- String in C Programming Language
String in C is collection of characters whereas character (char) in C is a single alphabet and programming in C is incomplete if you don’t have any idea about string declaration, initialization and reading string from keyboard. So in this C language - Call by Value and Call by Reference in C Programming
Call by value and call by reference is the most confusing concept among new C language programmer. I also struggled with this, the reason may be my teacher is not explaining it in simple words or I was dumb. Whatever the reason is; here I will try to - The C Programming Language - Brief History
Before we start any complex program in C, we must understand what really C is, how it came into existence and how it differs from other languages of that time. In this tutorial I will try to talk about these... - C Programming Lesson - Basic Virtual Keyboard Application
To accomplish this task you dont need to buy any expensive software or hardware, only a little knowledge of C program will do and you can build your own musical keyboard software. Before we begin you... - Looping in C Programming Language, It's Types and Example
Loop is one of the important parts of C language and study of C language is incomplete without this. So let’s head towards completion of our knowledge about C language. As a dedicated C language leaner, right now you should have two questions. What i - How While loop Works in C Programming Language
I already explained what is loop and why we use loop in c language, and I am not going to repeat that here again. So we will start with while loop explanation. While loop is one of the simple loop available in C language.It’s very easy to use, lets c - How For Loop Works in C Programming Language
Along with while loop and do-while loop, for loop is also part of C programming language. For many programmers, for loop seems to be easiest loop comparing other two loops (while and do-while loop). Mainly its structure (syntactically) makes it easy - C Programming Lesson - Do While Loop and Difference Between While and Do While Loop
If you are looking for what is loop and why we use loop in c language then you can check my article on that topic. This article is entirely dedicated to do-while loop and its usage. I must tell you that do-while loop is similar to while loop but only - Swap two variables without using third variable in C , C# and Java
This article explains how we can swap variable values without using third variable. There are different ways to do so and I tried including all know methods. You can get code in C, Java and C# language..... - C Programming Lesson - Function in C
A function in C language is a block of code that performs a specific task. It has a name and it is reusable i.e. it can be executed from as many different parts in a C Program as required. It also ... - C Programming Lesson - Types of Function
In my previous c programming tutorial I tried to explain what the function, its advantages is and how to declare a C function. And I told you that there are five types of functions and they are: ... - C Programming Lesson - Arrays
An array in C language is a collection of similar data-type, means an array can hold value of a particular data type for which it has been declared. Arrays can be created from any of the C data-types int,... - 2 Dimensional Array in C Programming Language
We know how to work with an array (1D array) having one dimension. In C language it is possible to have more than one dimension in an array. In this tutorial we are going to learn how we can use two... - C Programming Lesson - Multidimensional array (3D Array)
C allows array of two or more dimensions and maximum numbers of dimension a C program can have is depend on the compiler we are using. Generally, an array having one dimension is called 1D array, array... - C Programming Lesson - File Copy Program in C
Today we are going to learn a simple file copy program in C language. As I said this is a simple file copy program so you should not expect its output like DOS copy command has. Ok lets start. The main...
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Comments
An enum is an integer type.
what is boolean in data type
blooean is also a data type which can hold value like true or false (0 or 1). But boolean is not supported in C, boolean is supported in languages like C#, PHP, etc.
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Dear Raj, You have introdeced educational topic in hub pages. All the Best Carry on.
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is the value & reference is the basic data types of C???????
C is the basic programming language. If You are comfortable with C, then only you can able to learn more advance programming skills. I found above mention article on C very basic, but more important from the beginners point of view. Thanks for sharing it. This article surely reduces unnecessary fear of the computer language.
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Category Type Description Example
Reference object The ultimate base type of all other types object o = new Stack();
Reference string String type; a string is a sequence of Unicode characters string s = “Hello”;
value – int sbtype 8-bit signed integral type sbyte val = 12;
value – int short 16-bit signed integral type sgort val = 12;
value – int int 32-bit signed integral type int val = 12;
value – int long 64-bit signed integral type long val1 = 12;
long val2 = 34L;
value – int byte 8-bit unsigned integral type byte val1 = 12;
byte val2 = 34U;
value – int ushort 16-bit unsigned integral type ushort val1 = 12;
ushort val2 = 34U;
value – int uint 32-bit unsigned integral type uint val1 = 12;
uint val2 = 34U;
value – int ulong 64-bit unsigned integral type ulong val1 = 12;
ulong val2 = 34U;
ulong val3 = 56L;
ulong val4 = 78UL;
value – float float Single-precision floating point type float value = 1.23F;
value – float double Double-precision floating point type double val1 = 1.23
double val2 = 4.56D;
value – bool bool Boolean type; a bool value is either true or false bool value = true;
value – chat char Character type; a char value is a Unicode character char value = ‘h’;
value – decimal decimal Precise decimal type with 28 significant digits decimal value = 1.23M;
I feel ,like it it's importand from the biginners
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again thanx..........
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it is -32768 to +32767.......
it's good but so boring...
hello can i know about the data type in c
check the range of floats again
Could you explain clearly why sizeof(void) returns 1?
I wanted a quick overview of the difference between primary and secondary data types and your diagrams have done just that. Thanks!
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sir,
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it occupies memory only 8 bit but the range of character are 128. please explain this
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short int hold only 1 byte of storage
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c ccccccccccccccccccccccccccccccccccccccccccc dccccccccccccccccccc
Please give samples on Structures in Turbo C++
please tell me how to find the power of integers in C language?
answer for power any integer
#include
#include // we use the command with cc name of file -lm in ubuntu system
main()
{
int y;
int m,n;
puts("Enter your number");
scanf("%d%d",&m,&n);
y=pow(m,n);
printf("%d\n",y);
}
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C IS PROCEDER LANGUAGE AND SECURE AND FLEXIBLE AND ASSEMBLY LAGUAGE. AND C IS SECONED GENERATION LANGUAGE WHICH IS WIDLEY USED IN THIS WORLD FIRST B LANGUAGE WAS DEVELOPED BY KEN THOMPSON WHICH WAS FULL SUPPORTABLE ON MCHINE AND IN THIS LANGUAGE SOME KEYBORD THAT NOBADY KNOWS.
AND AFTER SOME TIME DINEIC SICHEE EXPANDE THESE LANGUAGE IN C LANGUAGE.
INTEGER HAVE 2 BYTE AND LONG HAVE 4 AND SHORT IS ONE WHY SHORT RANGE IS -32768 TO -32767 WHY ITS NOT EQUAL -128 TO 127
AJODHIA
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hai. how to declare string in c program
what is ERROR in C programming language?
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without variable declare we done c programming?
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which keyword is used in combination with a valid C data type to redefine the name of the data type?
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destructor can be called finalize or not in the java?
thanks...for quick reference sir..:)
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nice....it helped me alot for my seminar............
nice answer
what are compiler directives?
i like this theory because this i understand.thanks
so boring
what is the best book of c????????????
it is very simple if we understand properly
The best books..Oo..there are many
but you can refer to "Let Us C"-Yashwant kantentar OR
"C Programming \"-Balaguruswamy
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y do memory allocated to different data types of c are in even terms not in odd terms?
how can I do programming in IC?
Pls tell me......
explian data type in detial
thxxxxxxxxxx for this usefull inforamtion
Cool!!
hey ...i din get the point...that, Unsigned characters have values between 0 and 255, signed characters have values from –128 to 127. what does this means actually.plz elaborate.
signed intteger take both +ve and -ve value but unsigned integer take only +ve value
hey sir, the spelling of integer is wrong, in the table data types in c
how can we extend the range of values?????
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ANY OTHER KEY WORDS ARE THERE EXPECT 32
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What does E in 1.2E-38 refers to?
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sir plz describe the definition of int,float,char,double,void,
array,function,pointer
structure,unions,enumerations,
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i u c
T hank's Dear friend
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size of int,short,long,float and double
are archetecture dependent
some month before i dont know any inf in c
C is the basic programming language. If You are comfortable with C, then only you can able to learn more advance programming skills. I found above mention article on C very basic, but more important from the beginners point of view. Thanks for sharing it. This article surely reduces unnecessary fear of the computer language.
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Array in C programming
An array in C language is a collection of similar data-type, means an array can hold value of a particular data type for which it has been declared. Arrays can be created from any of the C data-types int,...
Thanks.....Raj
love U C................Learning U is just playing with a friend
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what is the use of %u in c language
Why dos integer datatype in c take 4 bytes in visual studio ?
plsss reply back!!!
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@Parvez size of any data type is compiler dependent.
if we have an intrest, then can we learn this subject very easily,,,,,
The C programming language is a standardized programming language developed in the early 1970s by Ken Thompson and Dennis Ritchie foruse on the UNIX operating system. It has since spread to many other operating systems, and is one of the most widely used programming languages. C is prized for its efficiency, and is the most popular programming language for writing system software, though it is also used for writing applications.
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what is the importance of the sizes of the data types in c language?
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Jst a question that U have not used in data types that is ''Format'' of these data types.Plz justify if so........
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no compiler not depend on variable..........
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what are data types in c?
what's the mean by recursion?
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Awesum...
Can any one tell me,that there are how many data types included in C and C#.
why uses # in c program
please reply this topic on that site
What variable? explane pointer variable
thankyou very much...............this provides us many hints for further study
thank's for deeply information
how can i print these data types i mean like %d for integer... what for double, long double and short int etc
WAT IS USE OF * IN SCANF STATEMAENT?
for double %lf & for long double %Lf, for short signed int %d, short unsigned int %u.
aliumar.in@gmail.com
Bhagalpur,
Bihar,
India.
i dont know c.how to do the programs,so plz give me a suggestion to over come the problem
plzzzz give me about the idea of modulus in algorithm
gooooooooooddddd
so confuse and so boring
@rajkishor09 ::::::::::::::?????????????????
if knw the correct ans den only post otherwise dont post..............dont misguide to people.......plz
who told u dat structure is NOT user defined data type,,,,,,,,,,,,,,,,,,,,buddy
its user defined data type ..pgmer only define types of variables which u Want..................so plzzzzzzzzzzz u knw correcr n accurate ans den post otherwise dont post
need to few is described
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why we need range for datatype like int as -32708 to 32627?
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pls help me....
kuch samajh nah araha
i think four batter c program tools this web site
can u tell me where the data type store in comp.memory
Excellent hub on Data types in C.... I am also a software developer and have started writing for hubpages under category of Java. I have published my first hubs as :
http://javaprograms.hubpages.com/hub/Introduction-
have a look .... Thanks for the wonderful information...
Thanks, it helps me alot
It is hard for UP board students only otherwise it is easy
what is abstract datatype?
plz tell me about the problems of floating point used in c programming language.plz tell me ans as soon as possible
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sreeemay 3 years ago
ur tought is so good try to write some other programms and refference books