Write a program to find the area of a rectangle by using user input in java

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Hellow guys, welcom to Lingarajtechhub.Today we are going to discuss finding the area of a rectangle by using user input in java.

 package com.operators.java;
  import java.util.Scanner;
  public class Area_of_rectangle {
	public static void main(String[] args) {
		int length,breadth,area;	//local variable
		Scanner sc =new Scanner (System.in); //create a scanner class
		System.out.println("Enter the length of rectangle : ");
		System.out.println("Enter the breadth of rectangle : ");
		area=length*breadth;	// formula area of rectangle 
		System.out.println("Area of the rectangle is : "+area);


package com.Operators.Java;

  •  It is a java package  which is a collection of classes and this package is created in a java project(Homework_operator) .
  • Here com.operators.java is the  name of our package.


import java.util.Scanner;

  • Scanner is a class in java
  • . util  package used for obtaining the input of the primitive types like int, double, etc. and strings .


public class Area_of_rectangle

  • Here “Area_of_rectangle” is defined as a class which is a template used to create objects ,& to define object ,data type and method.
  • It is defined as public because it can be accessed anywhere.
  • It is the entry point to the application.


public static void main(String[] args);

  • This is the main () method of our java program .
  • Every java program must contain the main() method .
  • Public : It is the access modifier of the main function which must be public so that the JRE can access and execute this method.
    • If a method is not public then access is restricted and its showing error.
  • Static : Static is a keyword in which the main method has to be static in which JVM can load the class into memory and call the main method without creating an instance .
  •  Void : It means no return types.
  •  Main() :  It is a function.
  •  String [] args :String means collection of characters
    •      String[] args represents a collection of Strings ,that are separated by a space and can be typed into the program on the terminal directly


 int length ,breadth , area ;

  • Here we Declare 3 variable length , breadth ,area  which is integer type and int is a local variable.


Scanner Sc = new Scanner(System.in);

  • Here scanner is a class and Sc is the instance of the object which is the new Scanner. System.in is an argument.




  • Length,breadth”  is a variable that we take and sc is our instance name which is created for an object and nextInt() is a method of a Scanner object that reads in a string of digits or char and converts them into an int type.


 System.out.println(” Area of the rectangle “+area);

  •  It means System is a class name and out is an instance of the System println is to print a new line and “+” means cocardinate.

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Myself Sonalin Shaoo. I am quite happy to contribute here some java programming content and my friends Lipsa Mohanty ,Sushil Puhan, Aswin Kumar Nayak also help me to contribute their Opinion on this .

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