C Language Fundamental Data Types: Int, Float, Char, Double
Posted on December 27, 2009
Fundamental / Basic / Primary Data Types in C Language
The fundamental data types are of following types:
Integer(int) data type:
Integers are whole numbers. They have no fractional parts. These integers are represented using int data type. Integers can be positive or negative. The integer variable consumes 2 bytes of memory in the code.
Example:
#include
Void main()
{
int num;
num=17;
}
Character(char) data type:
An identifier or a variable which is declared as a char becomes a character variable. The character variable consumes 1 byte of memory in the code.
Example:
#include
Void main()
{
char ch;
char ch1;
ch=’y’;
ch1=’n’;
}
Float(Decimal or Real Number ) data type:
An identifier declared as a float becomes a floating-point variable or a decimal number. Any number which is having a fractional part is known as a floating point variable.
Example:
#include
Void main()
{
float inch;
inch=9.5;
}
Double data type:
Double data type is also used for floating point numbers. But there is a difference in memory consumption. Float data type occupies 4 bytes of memory in the code whereas double occupies 8 bytes of memory i.e. twice as that of float.
Example:
#include
Void main()
{
double rupees;
rupees=6530000;
}
These data types have some modifiers associated with it which we will be discussing in the next section.
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