A Simple Java Program for demonstrating mathematical operations:
importjava.io.BufferedReader;
importjava.io.IOException;
importjava.io.InputStreamReader;
public class Rise {
public Rise(){};
public static void main (String[] args)
{
System.out.println(“Hello”);
String username = null;
String userExit= “N”;
try {
while(userExit.equalsIgnoreCase(“N”))
{
BufferedReader reader= new BufferedReader(new InputStreamReader(System.in));
System.out.print(“Please enter user name : “);
username = reader.readLine();
System.out.println(“Welcome :” + username);
System.out.print(“Please enter A for Addition, S for Subtraction and M for Multiplication: “);
String userChoice = null;
userChoice = reader.readLine();
if(userChoice.equalsIgnoreCase(“A”))
{
System.out.print(“Please enter two numbers to add: “);
int a = Integer.parseInt(reader.readLine());
int b = Integer.parseInt(reader.readLine());
int c = a+b;
System.out.print(“The Sum is: “+c);
}
else if(userChoice.equalsIgnoreCase(“S”))
{
System.out.print(“Please enter two numbers to subtract: “);
int a = Integer.parseInt(reader.readLine());
int b = Integer.parseInt(reader.readLine());
int c = a-b;
System.out.print(“The Difference is: “+c);
}
else if(userChoice.equalsIgnoreCase(“M”))
{
System.out.print(“Please enter two numbers to multiply: “);
int a = Integer.parseInt(reader.readLine());
int b = Integer.parseInt(reader.readLine());
int c = a*b;
System.out.print(“The Product is : “+c);
}
else
{
System.out.print(“Error!!! “);
}
System.out.print(“Do you want to continue Y/N?: “);
String yesNo = reader.readLine();
if (yesNo.equalsIgnoreCase(“N”))
{
userExit =”Y”;
}
else
{
userExit =”N”;
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}