Data Types in C

Here, we will learn about the data types in C such as int, char, float,double etc.
In C data types are used to declare variables.Data types determine the size and type of value which is associated with a variable.For example:

Here, num1 is a variable of int (integer) type. The size of int is at least 2, usually 4 bytes,depends upon 32 bits or 64 bits compiler.
num2 is a variable of float type. The size of float is 4 bytes.
ch is a variable of char (character) type. The size of char is 1 byte.

We can check the size of a variable using sizeof() opeartor.

#include<stdio.h>
#include<conio.h>
void main()
{
int num1=10;
float num2=20.45;
char ch='C';
printf("Value of num1 is %d and size of num1 is %d",num1,sizeof(num1));
printf("\nValue of num2 is %f and size of num2 is %d",num2,sizeof(num2));
printf("\nValue of ch is %c and size of ch is %d",ch,sizeof(ch));
getch();
}//end of main

Integers are used to store whole numbers.

Size and range of Integer type on 32-bit compiler:

Character types are used to store character values.

Size and range of Character type on 32-bit compiler:

Float types are used to store decimals or real numbers.

Size and range of Float type on 32-bit compiler:

void type means "no type"or "nothing".It does not store any value.void type is used in functions to specify that function is returning nothing. We can not declare a variable of type void.We will learn this datatype in advanced topics in C programming, like pointers,functions etc.