request : make a simple basic java program using two methods

Question

write a program which adds or subtract two number
here are condition:-
1. make a method which will add two no.
2. make a method which subtract the two no.
3. ask user if they wanna add or subtract and then call the method needed as per need
i am deeply confused and will really appreciate anyone who will make this basic script from which i can observe my mistake
here is my code for reference if you need but it is not working :(
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package practice;
import java.util.Scanner;
public class sum {
static Scanner input = new Scanner(System.in);
public static double addition(double s1 ,double s2 ) {
double sum1 = s1 + s2;
return sum1;
}
public static double subtraction(double s1, double s2) {
double sum1 = s1-s2;
return sum1;
}
public static void main(String args[])
{
double n1, n2, sum;
System.out.println("welcome do you want to add or divide");
String s = input.next();
if (s.equalsIgnoreCase("add") || (s.equalsIgnoreCase("addition")))
{
System.out.println("enter the two numbers");
n1 = input.nextDouble();
n2 = input.nextDouble();
sum = addition(n1, n2);
System.out.println(sum);
}
else if (s.equalsIgnoreCase("minus") || (s.equalsIgnoreCase("subtraction")))
{
System.out.println("enter the two numbers");
n1 = input.nextDouble();
n2 = input.nextDouble();
sum = subtraction(n1, n2);
System.out.println(sum);
}

}
}
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[/code]

Answer 1

Remove : package statment
Becz solo learn compiler does not support packages. So remove thats.