# Calculate Area of a Rectangle

This program calculates the area of a rectangle based on length and breadth entered by the user.

Variables:

1. length : (Datatype int): to represent the length of the rectangle.

2. breadth : (Datatype int): to represent the breadth of the rectangle.

3. area : (Datatype long): to store the result of the area of the rectangle is computed.

Functions:

printf() : is used to display something on the console/screen. Format specifier %d in printf function is used to display a int variable on screen and %ld for long. \n is used to add a new line

scanf() : is used to fetch data inputted by the user on the console/screen using the keyboard. %d in scanf is indicated that inputted text is of type int and %ld for long.

Formula:

Area of Rectangle: length x breadth

``````/*
* 1000+ C programs + tutorials
*
*
* 6_calculate_area_of_rectangle.c
*
*  Created on: Oct 20, 2014
*      Author: Code2care.org
*/

#include  <stdio.h>
//#include  <conio.h>

void main() {

int length;
long area;

//	clrscr();
printf(" Program to calculate Area of a Rectangle :  \n\n");

printf(" Enter the Length of a Rectangle : ");
scanf("%d", &length);

printf("\n\n Enter the Breadth of a Rectangle : ");

printf("\n\n Area of Rectangle with Length as %d and Breadth as %d  = %ld \n\n",length,breadth,area);

//	getch();

}``````
Output:
``````Program to calculate Area of a Rectangle :

Enter the Length of a Rectangle: 20
Enter the Breadth of a Rectangle: 10
Area of Rectangle with Length as 20 and Breadth as 10 = 200``````
Without using variable area
``````/*
* 1000+ C programs + tutorials
*
*
* 6_calculate_area_of_rectangle.c
*
*  Created on: Oct 20, 2014
*      Author: Code2care.org
*/

#include <stdio.h>
//#include  <conio.h>

void main() {

//	clrscr();
printf(" Program to calculate Area of a Rectangle :  \n\n");

printf(" Enter the Length of a Rectangle : ");
scanf("%d", &length);

printf("\n\n Enter the Breadth of a Rectangle : ");