Java program to find area of a rectangle













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Write a Java program to input length and width of a rectangle and find area of the given rectangle. How to calculate area of a rectangle in Java programming. Logic to find area of a rectangle whose length and width are given in Java programming.








Required knowledge

Arithmetic operators, Data types, Basic input/output


Area of rectangle

Area of a rectangle is given by the formula -

Area=lw

Where l is length and w is width of the rectangle.

Logic to find area of rectangle

Below is the step by step descriptive logic to find area of rectangle -

  1. Input length and width of rectangle. Store it in two different variables say length and width.

  2. Apply formula to calculate rectangle area i.e. area = length * width.

  3. Finally, print the value of area.


Program to find area of rectangle
/**
 * Java program to find area of rectangle
 */

import java.util.Scanner;

class Test
{
public static void main(String args[])
{
    float length, width, area;
    Scanner op=new Scanner(System.in);
    /*
     * Input length and width of rectangle
     */
    System.out.print("Enter length of rectangle: ");
    length=op.nextFloat();
    System.out.print("Enter width of rectangle: ");
    width=op.nextFloat();

    /* Calculate area of rectangle */
    area = length * width;

    /* Print area of rectangle */
    System.out.println("Area of rectangle = "+area+" sq. units ");
    }
}




Output:

Enter length of rectangle: 5
Enter width of rectangle: 3
Area of rectangle = 15.0 sq. units









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