import java.io.*; // sqrt, abs and pow are part of the Math class. The class is // static so we do not need to create an instance of it class primetest {public static input in = new input(); public static void main(String[] args) throws IOException {int n,x; boolean prime = true; System.out.println("Enter a number "); n = in.getInt(); for (x=2; x <= Math.sqrt(n) && prime; x++) if (n % x == 0) {System.out.println("Not Prime"); prime = false; } if (prime) System.out.println("Prime"); System.out.println("2 to the 5th power is "+Math.pow(2,5)); System.out.println("Absolute of - 5 is "+Math.abs(-5)); } }