Data Types: 

To store data the program must reserve space which is done using datatype. A datatype is a keyword/predefined instruction used for allocating memory for data. A data type specifies the type of data that a variable can store such as integer, floating, character etc. It used for declaring/defining variables or functions of different types before to use in a program. 

Basic Data Type int, char, float, double 

Derived Data Type array, pointer, structure, union 

Enumeration Data Type enum Void Data Type void 

Type Size (bytes) Range Control String 

char or signed char 1 -128 to 127 %c

unsigned char 1 0 to 255 %c  

int or signed int 2 -32768 to 32767 %d or %i 

unsigned int 2 0 to 65535 %u 

short int 1 -128 to 127 %d or %i 

unsigned short int 1 0 to 255 %d or %i 

long int 4 -2147483648 to 2147483647 %ld 

unsigned long int 4 0 to 4294967295 %lu 

float 4 3.4E-38 to 3.4E+38 %f or %g 

double 8 1.7E-308 to 1.7E+308 %lf 

long double 10 3.4E-4932 to 1.1E+4932 %Lf