Lab02 CSE110_JAVA.txt

Lab02 - CSE110_JAVA
Spring-2024



ClassWork:#######################################################################################################



task:03---------------------------------------------------------



i) 


public class SwapUsingThirdVariable {
    public static void main(String[] args) {
        int a = 10; // Initialize first variable
        int b = 5;  // Initialize second variable

        System.out.println("Before swapping: a = " + a + ", b = " + b);

        // Swap using a third variable
        int temp = a;
        a = b;
        b = temp;

        System.out.println("After swapping: a = " + a + ", b = " + b);
    }
}





ii)


public class SwapWithoutThirdVariable {
    public static void main(String[] args) {
        int a = 10; // Initialize first variable
        int b = 5;  // Initialize second variable

        System.out.println("Before swapping: a = " + a + ", b = " + b);

        // Swap without using a third variable
        a = a + b; // a now becomes 15 (10 + 5)
        b = a - b; // b now becomes 10 (15 - 5)
        a = a - b; // a now becomes 5 (15 - 10)

        System.out.println("After swapping: a = " + a + ", b = " + b);
    }
}




task:05---------------------------------------------------------




/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
public class Lab1 {
  public static void main(String[] args) { 
        double a = 4.5;
        double b = 9.5;
        // Calculate the length of the third side (c) using the Pythagorean theorem
        double c = Math.sqrt((a * a) + (b * b));
        System.out.println("c: "+c);
        // Calculate the sine and cosine values of angle A
        double sinA = a / c;
        double cosA = b / c;
        // Calculate the sine and cosine values of angle B
        double sinB = b / c;
        double cosB = a / c;
        
        // Print the results
        System.out.println("Sine of angle A (SinA): " + sinA);
        System.out.println("Cosine of angle A (CosA): " + cosA);
        System.out.println("Sine of angle B (SinB): " + sinB);
        System.out.println("Cosine of angle B (CosB): " + cosB);
  }
  /* ADD YOUR CODE HERE */
}

Class Evaluation:#######################################################################################################


task:01---------------------------------------------------------

/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
public class Lab1 {
  
  
  public static void main(String[] args) { 
    int a = 2;
    int b = 5;
    int c = 8;
    int d = ( (2*b) * ((c-a)/3) ) + 7;
      System.out.println("Answer: "+d);
  }
  
  /* ADD YOUR CODE HERE */
}



task:02---------------------------------------------------------


/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
public class Lab1 {
  
  
  public static void main(String[] args) { 
    int id = 20301238;
    int last_two = id % 100;
    System.out.println(last_two%10+"\n"+last_two/10);

  }
  
  /* ADD YOUR CODE HERE */
}





Homework:#######################################################################################################

task:01---------------------------------------------------------

/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
public class Lab1 {
  
  
  public static void main(String[] args) { 
    System.out.println("Hello World!");
    
    Scanner sc = new Scanner (System.in); 
    System.out.print("Enter an integer: ");
    int num = sc.nextInt();
     
    num=num%100;
    System.out.print("Output: ");
    if (num==0) {
      System.out.println("00");
    }
    else {
      if (num<10){
        System.out.print("0");
        System.out.println(num);
      }
      else{
        System.out.println(num);
      }
    }
    
  }
  
  /* ADD YOUR CODE HERE */
}





task:02---------------------------------------------------------



/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
public class Lab1 {
  
  
  public static void main(String[] args) { 
    System.out.println("Hello World!");
    
    Scanner sc = new Scanner (System.in); 
    System.out.print("Given a value for inch: ");
    double num = sc.nextInt();
    num= num* 0.0254;
    String value= String.valueOf(num);    // Converting double to string
    System.out.println("1000 inch is "+ value+ " meters");
 
  }
  
  /* ADD YOUR CODE HERE */
}






task:03---------------------------------------------------------


/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
import java.lang.Math;
public class Lab1 {
  
  
  public static void main(String[] args) { 
    System.out.println("Hello World!");
    int radius = 4;
    double circumference = 2 * Math.PI * radius;
    double area = Math.PI * radius * radius;

    System.out.println("For a circle with radius " + radius + " units:");
    System.out.println("Circumference: " + circumference + " units");
    System.out.println("Area: " + area + " square units");
    

  }
  
  /* ADD YOUR CODE HERE */
  /* We can convert float to double but cannot do vice-versa */
}


task3 ALTERNATIVE using float


/**
 * Auto Generated Java Class.
 */

import java.util.Scanner; 
public class test3 {
  
  
  public static void main(String[] args) { 
    float radius = 4f;
    float circumference = 2 * (float) Math.PI * radius;
    float area = (float) Math.PI * radius * radius;
    System.out.println("Radius: " + radius);
    System.out.println("Circumference: " + circumference);
    System.out.println("Area: " + area);
    
    }
    
  }


task:04---------------------------------------------------------



/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
public class Lab1 {
  
  
  public static void main(String[] args) { 
    System.out.println("Hello World!");
    int n=5;
    System.out.println(n+" X 1 = "+n);
    System.out.println(n+" X 1 = "+(n*2));
    System.out.println(n+" X 1 = "+(n*3));
    System.out.println(n+" X 1 = "+(n*4));
    System.out.println(n+" X 1 = "+(n*5));
    System.out.println(n+" X 1 = "+(n*6));
    System.out.println(n+" X 1 = "+(n*7));
    System.out.println(n+" X 1 = "+(n*8));
    System.out.println(n+" X 1 = "+(n*9));
    System.out.println(n+" X 1 = "+(n*10));


  }
  
  /* ADD YOUR CODE HERE */
}





task:06---------------------------------------------------------


/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
public class Lab1 {
  
  
  public static void main(String[] args) { 
    System.out.println("Hello World!");
    Scanner sc = new Scanner (System.in); 
    System.out.print("Enter the number of terms 'n': ");
    int n = sc.nextInt();
    System.out.print("Enter the first term 'a': ");
    int a= sc.nextInt();
    System.out.print("Enter the last term 'L': ");
    int L = sc.nextInt();
    float S = (n/2) *(a + L);
    System.out.println("Output: "+S);
  }
  
  /* ADD YOUR CODE HERE */
}





task:07---------------------------------------------------------


/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
public class Lab1 {
  
  
  public static void main(String[] args) { 
    double hour = 5d;
    double minute = 56d;
    double seconds = 23d;
    double distance_meters = 1230d;
    double distance_km = distance_meters/1000;
    double distance_mile = distance_meters * (1.0/1609.0);
    hour = hour + (minute / 60) + (seconds /(60 * 60));

    double velocity_km_hour = distance_km / hour;
    double velocity_mile_hour = distance_mile / hour;
    System.out.println("Velocity KMPH: "+velocity_km_hour+"\nVelocity MPH: "+velocity_mile_hour);


  }
  
  /* ADD YOUR CODE HERE */
}



task:08---------------------------------------------------------


/**
 * Auto Generated Java Class.
 */
import java.util.Scanner; 
public class Lab1 {
  
  
  public static void main(String[] args) { 
    double a = 8d;
    double b = 3d;
    //We know, c= root(a^2 * b^2)
    double c = Math.sqrt(Math.pow(a/2,2) + Math.pow(b,2));  // c is the length of a side
    System.out.println(c);
    double area = (3*Math.sqrt(3)*(c*c))/2;
    double circumference = 6 * c;
    System.out.println("Area: "+area+" and Circumference: "+circumference);
  }
  
  /* ADD YOUR CODE HERE */
}