alll of DS4

package lessons;
import javax.swing.JOptionPane;
public class AndOperator
{
// p//program that determines if user qualifies for loan, must have annual salary >30'000 and worked there for
	//2or more years
	public static void main(String[] args)
	{
		// these are logical operators NOT comparison
		double salary;
		int years;
		String In;
		In = JOptionPane.showInputDialog("whats ur annual salary");
		salary = Double.parseDouble(In);
		In = JOptionPane.showInputDialog("how long have you worked at ur current job");
		years = Integer.parseInt(In);

		if (salary >= 30_000 && years >= 2)
		{
			JOptionPane.showMessageDialog(null,"yes you qualify");
		}
		else
		{
			JOptionPane.showMessageDialog(null, "no you dont qualify");
		}
		System.exit(0);
	}

}




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package lessons;

import java.util.Scanner;

public class NotOperator
{

	public static void main(String[] args)
	{
		// logical operators test two or more boolean expressions
		//prescidence is and(&&), or(||), not(!)
		//unary operator that changes the boolean input to the opposite so if input is true output is false
		Scanner keyboard = new Scanner(System.in);
		Double temp;
		System.out.println("enter a temp");
		temp = keyboard.nextDouble();

		if (!(temp > 100))// if smaller argument is true it is turned to false, 'if temp is not greater than 100'
		{
			System.out.println("below max temp");

		}
		else
		{
			System.out.println("above max temp");
		}
		keyboard.close();
	}

}





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package lessons;
import java.util.Scanner;
public class NumericRanges
{
	//determines if value is within specific range of values

	public static void main(String[] args)
	{
		Scanner keyboard = new Scanner(System.in);
		int x;
		System.out.println("enter value for x");
		x = keyboard.nextInt();

		if (x >= 20 && x <=40 )
		{
			System.out.println("num is between 20-40");
		}
		else
		{

		}

		//check if outside range between 20-40
		if (x < 20 | x > 40 )
		{
			System.out.println("num is between 20-40");
		}
		else
		{

		}

		keyboard.close();
	}

}




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package lessons;

import javax.swing.JOptionPane;

public class OrOperator
{

	public static void main(String[] args)
	{
		double salary;
		int years;
		String In;
		In = JOptionPane.showInputDialog("whats ur annual salary");
		salary = Double.parseDouble(In);
		In = JOptionPane.showInputDialog("how long have you worked at ur current job");
		years = Integer.parseInt(In);

		if (salary >= 30_000 || years >= 2)
		{
			JOptionPane.showMessageDialog(null,"yes you qualify");
		}
		else
		{
			JOptionPane.showMessageDialog(null, "no you dont qualify");
		}
		System.exit(0);
	}

}



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package act;

import java.util.Scanner;

public class SpeedFines
{

	public static void main(String[] args)
	{
		Scanner keyboard = new Scanner(System.in);
		int limit, speed, f;
		System.out.print("enter speed limit:");
		limit = keyboard.nextInt();
		System.out.print("enter the recorded speed of the car:");
		speed = keyboard.nextInt();
		int diff = speed - limit;
		if (speed >= 0 && speed <= limit )
		{
			System.out.println("Congratulations, you are within the speed limit!");
		}
		else if (diff >= 1 && diff <= 20)
		{
			f = 100;
			System.out.println("You are speeding and your fine is $"+f);
		}
		else if (diff >= 21 && diff <= 30)
		{
			f = 270;
			System.out.println("You are speeding and your fine is $"+f);
		}
		else if (diff >= 31)
		{
			f = 500;
			System.out.println("You are speeding and your fine is $"+f);
		}
		else
		{
			System.out.println("inavlid speed");
		}

		keyboard.close();


	}

}