Laboratory Activity: Methods

numberManipulation.java

import java.util.Scanner;

public class numberManipulation {

	static String DecToBinary(int num) {
		if(num <= 0) return ""+num;
		String hold = "";
		while(num!=0) {
			hold = (num%2)+hold;
			num/=2;
		}
		return hold;
	}
	static boolean isNegative(int num) {
		if (num < 0) return true;
		else return false;
	}
	static boolean isPositive(int num) {
		if (num > 0) return true;
		else return false;
	}
	static String Odd(int num) {
		if (num%2 == 1) return "Yes";
		else return "No";
	}
	static String Even(int num) {
		if (num%2 == 0) return "Yes";
		else return "No";
	}
	public static void main(String[] args) {
		Scanner sc = new Scanner (System.in);
		System.out.print("Enter number: ");
		int num = sc.nextInt();
		sc.close();
		System.out.println("Binary Value\t: "+DecToBinary(num));
		System.out.println("isNegative\t: "+isNegative(num));
		System.out.println("isPositive\t: "+isPositive(num));
		System.out.println("Odd\t\t\t: "+Odd(num));
		System.out.println("Even\t\t: "+Even(num));
	}
}

powerOfANumber.java

import java.util.Scanner;

public class powerOfANumber {
	
	public static double boomboomPow(double num,double exp){
		double total=1;
		for(int i=1;i<=exp;i++){
			total*=num;
		}
		return total;
	}
	
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		double num, exp;
		System.out.print("Enter num: ");
		num = sc.nextDouble();
		System.out.print("Enter exponent: ");
		exp = sc.nextDouble();
		System.out.println("Result: "+(int)boomboomPow(num,exp)+".");
	}
}