what is data type in c explain
Answers
In the C programming language, data types constitute the semantics and characteristics of storage of data elements. They are expressed in the language syntax in form of declarations for memory locations or variables. Data types also determine the types of operations or methods of processing of data elements.
Explanation: Data types specify how we enter data into our programs and what type of data we enter. C language has some predefined set of data types to handle various kinds of data that we can use in our program. These data types have different storage capacities.
C language supports 2 different type of data types:
Primary data types:
These are fundamental data types in C namely integer(int), floating point(float), character(char) and void.
Derived data types:
Derived data types are nothing but primary datatypes but a little twisted or grouped together like array, stucture, union and pointers. These are discussed in details later.
Data type determines the type of data a variable will hold. If a variable x is declared as int. it means x can hold only integer values. Every variable which is used in the program must be declared as what data-type it is.
Integer type
Integers are used to store whole numbers.
Size and range of Integer type on 16-bit machine:
Type Size(bytes) Range
int or signed int 2 -32,768 to 32767
unsigned int 2 0 to 65535
short int or signed short int 1 -128 to 127
unsigned short int 1 0 to 255
long int or signed long int 4 -2,147,483,648 to 2,147,483,647
unsigned long int 4 0 to 4,294,967,295
Floating point type
Floating types are used to store real numbers.
Size and range of Integer type on 16-bit machine
Type Size(bytes) Range
Float 4 3.4E-38 to 3.4E+38
double 8 1.7E-308 to 1.7E+308
long double 10 3.4E-4932 to 1.1E+4932
Character type
Character types are used to store characters value.
Size and range of Integer type on 16-bit machine
Type Size(bytes) Range
char or signed char 1 -128 to 127
unsigned char 1 0 to 255
void type
void type means no value. This is usually used to specify the type of functions which returns nothing. We will get acquainted to this datatype as we start learning more advanced topics in C language, like functions, pointers etc.