Can Anyone Write a Program that does this?

Question

Once again , I know it's simple but I unfortunatly can't accomplish this task if anyone can write this program for me with the use of simple recursive arguements I would appreciate it..
pre: n greater than or equal to 0
post: return true if n is prime and false otherwise
thats the problem

Answer 1

I scrapped working on that one , heres what im doing now..public class plus251
We are to Recursively add well you can read the pre and post conditions, now im basically supposed to follow this same setup which I wrote out , but now im too multiply by adding and I cant figure out the recursive part I know that the base case is if a == 1 return b , but its the else which I have no clue how to write..
public static void main(String[]args)
     /* pre: a and b are positive integers
     post: outputs a + b by adding 1 to b, a times
     int a, b;
     System.out.println("enter an integer");
a = Console.readInt();
System.out.println("enter an integer");
b = Console.readInt();
     System.out.println("a+b = "+ plus(a,b));
public static int plus(int a, int b)
     /* pre: a and b are positive ints
     post: returns a + b
     if (a==0)
     return(b); /* this will add the accumulated
ones to b to get the total */
     else
     return(1+plus(a-1, b)); /*this returns 1 until a
becomes 0 */
     a is 0 ---- return b
     plus(b, k) ---- returns mathplus(b, k)
     plus(b, k+1) --- returns mathplus(b, k+1)
plus(b,k+1) ---- returns 1+ plus(b, k)
|
     |          1+ mathplus(b, k)
|
     ------------------ mathplus(b, k+1)