Data Type In “C”

 Data Type In "C"

DATATYPE	SIZE(IN BITE)
INT(Integer)	2
Short INT	TC=2,ANSI=1
Long INT	4
Unsigned INT(+)	2
Float	4
Double	8
Long Double	10
Chr(Character)	1
Unsigned Char(+)	1

 

 

 

 

 

 

 

 Categories

Integer-Int , Short Int , Long Int , Unsigned Int(+)

Real-Float , Double , Long Double , 

Character-Char , Unsigned Char(+)

Some IMP Point About Data Type

• All Data Type Are Keyword Means Reserved Words
• Size Of Data Type Is A Compiler Depended Property ,Means diff.Computer Support diff Size Of Data Type
• "Unsigened"Means Data Type Can Hold Only +Ve Value
• In TC/TCC+, "Short int" And "Int" Both Are Same Data Type , Because Both Data Type Takes 2Bytes , So Range Will Be Same
• "String" Is Not An Compiler Defined Data Type.It Means Group Of Character
• In TC/TCC+ "Char" Data Type Is By Defult "Unsigned Char" Because In TC/TCC+ Char Value Cant'be -ve.

Formulae Calculation Of Data Type

• -2^(n-1) to (2^(n-1)-1  //  for signed data type
• 0 to (2^n)-1  //  for unsigned data type

                  n: no of bits (1Byte =8 Bits)

Example

1)"int" (2bytes means 16 bits)

    -2^(16-1) to (2^(16-1))-1    (-32768 to 32767)

2)"unsigned int" (2bytes means 16 bits)

   0 to (2^16)-1    (0 to 65535)

3)"short int" (2 bytes (in TC) means 16 bits)

   -2^(16-1) to (2^(16-1))-1  (-32768 to 32767)

4)"short int" (1bytes (in ANSI) means 8 bits)

    -2^(8-1) to (2^(8-1))-1  (-128 to 127)

5)"char"/"unsigned char"

   0 to (2^8)-1     (0 to 255)

                                         -SHAHRUKH KHAN(CSE)