I am very new to Java, (and to programming altogether). I am sure that the solution to my problem is very simple, but I just can't figure it out. The code below is a small chunk of my program. But it is still compile-able, and still has the same problem.
Here is the code::
import java.util.Scanner;
public class Practice{
public static void main(String args[]){
Scanner input = new Scanner(System.in);
String command = "";
double d; // Distance
double t; // Time
double s; // Speed
System.out.println("Hello, I am the Physics Calculator!!");
while (!command.equals("end")){
System.out.print("What would you like to calculate?: "); // after the first loop, this statement is printed twice to the screen! :(
command = input.nextLine();
System.out.println();
if (command.equals("speed")){
System.out.print("What is the distance in meters?: ");
d = input.nextDouble();
System.out.print("What is the time is seconds?: ");
t = input.nextDouble();
s = d / t;
System.out.println("The Speed is "+ s +" m/s");
System.out.println();
}
} //End of the while-loop
}
}
The first line of code within the while-loop is:
System.out.println("What would you like to calculate?: ");
So far so good. When I run the program, it prints: *What would you like to calculate?: *
And then the program continues as expected.
The problem is after the program reaches the end of the while-loop, and returns to the top of the while loop. it will print:
What would you like to calculate?:
What would you like to calculate?:
I just can't figure out why it prints it out twice.
Here is an example of the exact output I received when running the program (The italic is the output to the console and the bold is my input):
Start{
Hello, I am the Physics Calculator!!
What would you like to calculate?: speed
What is the distance in meters?: 50
What is the time is seconds?: 50
The Speed is 1.0 m/s
What would you like to calculate?:
What would you like to calculate?:
}End
At the end, I can still type 'speed' and continue on with the program. I just want to get rid of the second 'What would you like to calculate'.
Any input regarding the problem that I am having will be highly appreciated!!
Thank you very much for your time!!