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C Data Types

Data type is used to specify the type of data.

Type Data types
Basic Data Type int, char, float, double
Derived Data Type array, pointer, structure, union
Enumeration Data Type enum
Void Data Type void

Basic Data Types

Type Storage size Value range
char 1 byte -128 to 127 or 0 to 255
unsigned char 1 byte 0 to 255
signed char 1 byte -128 to 127
int 2 bytes -32,768 to 32,767
unsigned int 2 bytes 0 to 65,535
short 2 bytes -32,768 to 32,767
long 4 bytes -2,147,483,648 to 2,147,483,647
unsigned long 4 bytes 0 to 4,294,967,295
float 4 bytes 1.2E-38 to 3.4E+38 (6 decimal places)
double 8 bytes 2.3E-308 to 1.7E+308 (15 decimal places)
Long double 10 bytes 3.4E-4932 to 1.1E+4932 (19 decimal places)

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