Data Types & variables

Screenshot :

Theory :

Data types are use for declaring variables of different types

Basic datatypes are int,char,float.

Variable Declaration Rules :

 1) You should not begin a variable name with a number. They can contain numbers, but you begin it with a letter.

 2) Length of variable name should not be greater than 8.

 3) The shortest variable name is a letter of the alphabet.

 4) Avoid naming your variables the same as C language keywords or functions

 5) Don't give similar names to your variables.

Code :

#include<stdio.h>

#include<conio.h>

void main()

{

int i_no=10;        //declaration of integer variable

float f_no=1.12; //declaration of float variable

char cha='a'; //declaration of character variable

clrscr();

printf("\n\tInteger Number = %d ",i_no);

printf("\n\tFloat Number = %f",f_no);

printf("\n\tCharacter = %c",cha);

getch();

}

Note : // is use for comment about statement

Here i_no is integer variable,f_no is float variable while cha is character variable

%d is use to print integer variable

%f is use to print float variable

%c is use to print character variable

Output :