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  • C Programming Tutorial
  • C Programming useful Resources
  • Selected Reading

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Data types in c refer to an extensive system used for declaring variables or functions of different types. The type of a variable determines how much space it occupies in storage and how the bit pattern stored is interpreted.

The types in C can be classified as follows −

Sr.No.Types & Description
1

Basic Types Grandtotal 4 2 6 – create invoices and estimates.

Super resize 1 2 1. They are arithmetic types and are further classified into: (a) integer types and (b) floating-point types.

2

Enumerated types

They are again arithmetic types and they are used to define variables that can only assign certain discrete integer values throughout the program.

3

The type void

The type specifier void indicates that no value is available.

4

Derived types

How do you take screen shot on pc. They include (a) Pointer types, (b) Array types, (c) Structure types, (d) Union types and (e) Function types.

The array types and structure types are referred collectively as the aggregate types. The type of a function specifies the type of the function's return value. We will see the basic types in the following section, where as other types will be covered in the upcoming chapters.

Integer Types

The following table provides the details of standard integer types with their storage sizes and value ranges −

TypeStorage sizeValue range
char1 byte-128 to 127 or 0 to 255
unsigned char1 byte0 to 255
signed char1 byte-128 to 127
int2 or 4 bytes-32,768 to 32,767 or -2,147,483,648 to 2,147,483,647
unsigned int2 or 4 bytes0 to 65,535 or 0 to 4,294,967,295
short2 bytes-32,768 to 32,767
unsigned short2 bytes0 to 65,535
long8 bytes or (4bytes for 32 bit OS)-9223372036854775808 to 9223372036854775807
unsigned long8 bytes0 to 18446744073709551615

To get the exact size of a type or a variable on a particular platform, you can use the sizeof operator. The expressions sizeof(type) yields the storage size of the object or type in bytes. Given below is an example to get the size of various type on a machine using different constant defined in limits.h header file −

When you compile and execute the above program, it produces the following result on Linux −

Floating-Point Types

The following table provide the details of standard floating-point types with storage sizes and value ranges and their precision −

TypeStorage sizeValue rangePrecision
float4 byte1.2E-38 to 3.4E+386 decimal places
double8 byte2.3E-308 to 1.7E+30815 decimal places
long double10 byte3.4E-4932 to 1.1E+493219 decimal places

The header file float.h defines macros that allow you to use these values and other details about the binary representation of real numbers in your programs. The following example prints the storage space taken by a float type and its range values −

When you compile and execute the above program, it produces the following result on Linux −

The void Type

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The void type specifies that no value is available. It is used in three kinds of situations −

Type
Sr.No.Types & Description
1

Function returns as void

There are various functions in C which do not return any value or you can say they return void. A function with no return value has the return type as void. For example, void exit (int status); 2008 mitsubishi fk260 manual.

2

Function arguments as void

Jihosoft pdf password remover 1 2. There are various functions in C which do not accept any parameter. A function with no parameter can accept a void. For example, int rand(void);

3

Pointers to void

Cleanmymac x 4 4 4. A pointer of type void * represents the address of an object, but not its type. For example, a memory allocation function void *malloc( size_t size ); returns a pointer to void which can be casted to any data type.

  • C Programming Tutorial
  • C Programming useful Resources
  • Selected Reading

Data types in c refer to an extensive system used for declaring variables or functions of different types. The type of a variable determines how much space it occupies in storage and how the bit pattern stored is interpreted.

The types in C can be classified as follows −

Sr.No.Types & Description
1

Basic Types How many people playing pubg right now.

They are arithmetic types and are further classified into: (a) integer types and (b) floating-point types.

2

Enumerated types

They are again arithmetic types and they are used to define variables that can only assign certain discrete integer values throughout the program.

3

The type void

The type specifier void indicates that no value is available.

4

Derived types

They include (a) Pointer types, (b) Array types, (c) Structure types, (d) Union types and (e) Function types.

The array types and structure types are referred collectively as the aggregate types. The type of a function specifies the type of the function's return value. We will see the basic types in the following section, where as other types will be covered in the upcoming chapters.

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Integer Types

The following table provides the details of standard integer types with their storage sizes and value ranges −

TypeStorage sizeValue range
char1 byte-128 to 127 or 0 to 255
unsigned char1 byte0 to 255
signed char1 byte-128 to 127
int2 or 4 bytes-32,768 to 32,767 or -2,147,483,648 to 2,147,483,647
unsigned int2 or 4 bytes0 to 65,535 or 0 to 4,294,967,295
short2 bytes-32,768 to 32,767
unsigned short2 bytes0 to 65,535
long8 bytes or (4bytes for 32 bit OS)-9223372036854775808 to 9223372036854775807
unsigned long8 bytes0 to 18446744073709551615

To get the exact size of a type or a variable on a particular platform, you can use the sizeof operator. The expressions sizeof(type) yields the storage size of the object or type in bytes. Given below is an example to get the size of various type on a machine using different constant defined in limits.h header file −

When you compile and execute the above program, it produces the following result on Linux −

Floating-Point Types

The following table provide the details of standard floating-point types with storage sizes and value ranges and their precision −

TypeStorage sizeValue rangePrecision
float4 byte1.2E-38 to 3.4E+386 decimal places
double8 byte2.3E-308 to 1.7E+30815 decimal places
long double10 byte3.4E-4932 to 1.1E+493219 decimal places

The header file float.h defines macros that allow you to use these values and other details about the binary representation of real numbers in your programs. The following example prints the storage space taken by a float type and its range values −

When you compile and execute the above program, it produces the following result on Linux −

The void Type

The void type specifies that no value is available. It is used in three kinds of situations −

Sr.No.Types & Description
1

Function returns as void

There are various functions in C which do not return any value or you can say they return void. A function with no return value has the return type as void. For example, void exit (int status);

2

Function arguments as void

There are various functions in C which do not accept any parameter. A function with no parameter can accept a void. For example, int rand(void);

3

Pointers to void

A pointer of type void * represents the address of an object, but not its type. For example, a memory allocation function void *malloc( size_t size ); returns a pointer to void which can be casted to any data type.





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