Goldbach Number ISC Computer Science 2018 Practical
A Goldbach number is a positive even integer that can be expressed as the sum of two odd primes. Note : All even integer numbers greater than 4 are Goldbach numbers. Example : 6 = 3 + 3 10 = 3 + 7 10 = 5 + 5 Hence, 6 has one odd prime pair 3 and 3. Similarly, 10 has two odd prime pairs, i.e. 3 and 7, 5 and 5. Write a program to accept an even integer 'N' where N > 9 and N < 50. Find all the odd prime pairs whose sum is equal to the number 'N'. Test your program with the following data and some random data: Example 1 : INPUT: N = 14 OUTPUT: PRIME PAIRS ARE: 3, 11 7, 7 Example 2 : INPUT: N = 30 OUTPUT: PRIME PAIRS ARE: 7, 23 11, 19 13, 17 Example 3 : INPUT: N = 17 OUTPUT: INVALID INPUT. NUMBER IS ODD. Example 4 : INPUT: N = 126 OUTPUT: INVALID INPUT. NUMBER OUT OF RANGE. import java.util.Scanner; class Goldbach{ public static void main(String args[]){ Scanner in = new Scanner(System.in); System.out.p...