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Java program to print the area and perimeter of a rectangle.

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import java.util.*;
class Exercise5{
public static void main(String args[]){
Scanner sc=new Scanner(System.in);
System.out.println("Enter radius of circle");
double length=sc.nextDouble();
double width=sc.nextDouble();
double area;
area=length*width;
System.out.println("Area of rectangle = "+area);
}
}

Save as: exercise5.java

Output:
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Java program to print the sum (addition), multiply, subtract, divide and remainder of two numbers.

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import java.util.Scanner; class Exercise1{ public static void main(String args[]){ Scanner io=new Scanner(System.in); System.out.println("Enter the first number. = "); int num1=io.nextInt(); System.out.println("Enter the second number = "); int num2=io.nextInt(); int sum,mult,sub,div,rem; sum=num1+num2; mult=num1*num2; sub=num1-num2; div=num1/num2; rem=num1%num2; System.out.println("Sum of \t\t"+num1+" & "+num2+" = "+sum); System.out.println("Multiply of \t"+num1+" & "+num2+" = "+mult); System.out.println("Subtract of \t"+num1+" & "+num2+" = "+sub); System.out.println("Divide of \t"+num1+" & "+num2+" = "+div); System.out.println("Remainder of \t"+num1+" & "+num2+" = "+rem); } } Save as: Exercise1.java Output:
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