//ques 1(* Write a program to Print "Welcome To Java ". *) public class Welcome { public static void main(String[] args) { System.out.println("Welcome To Java"); } }

//ques 2 WAP to print your address i) using single print ii) using multiple println public class PrintAddress { public static void main(String[] args) { System.out.println( "123, Green Street\n" + "Apt 45B\n" + "Gurugram, Haryana\n" + "India" ); } } //Using multiple System.out.println(...) calls public class PrintAddress { public static void main(String[] args) { System.out.println("123, Green Street"); System.out.println("Apt 45B"); System.out.println("Gurugram, Haryana"); System.out.println("India"); } } //ques 3 WAP to print addition of 2 numbers (with Scanner) public class AddTwoNumbers { public static void main(String[] args) { Scanner sc = new Scanner(System.in);

    System.out.print("Enter first number: ");
    int num1 = sc.nextInt();

    System.out.print("Enter second number: ");
    int num2 = sc.nextInt();

    sc.close();

    int sum = num1 + num2;
    System.out.println("Sum = " + sum);
}

} // ques 4 Write a program in Java to design simple calculator for (+, -, *, and /) using switch case import java.util.Scanner;

public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.print("Enter first number: "); double a = sc.nextDouble(); System.out.print("Enter second number: "); double b = sc.nextDouble(); System.out.print("Choose operator (+, -, *, /): "); char op = sc.next().charAt(0);

    switch (op) {
        case '+': System.out.println("Result: " + (a + b)); break;
        case '-': System.out.println("Result: " + (a - b)); break;
        case '*': System.out.println("Result: " + (a * b)); break;
        case '/': 
            if (b != 0) System.out.println("Result: " + (a / b)); 
            else System.out.println("Cannot divide by zero");
            break;
            default: System.out.println("Invalid operator");
    }
}

} // ques 5 WAP that reads a number in meters converts it to feet and displays the result import java.util.Scanner;

public class MeterToFeet { public static void main(String[] args) { Scanner sc = new Scanner(System.in); System.out.print("Enter distance in meters: "); double meters = sc.nextDouble(); double feet = convertMetersToFeet(meters); System.out.printf("%.2f meters = %.4f feet\n", meters, feet); sc.close(); }

public static double convertMetersToFeet(double meters) {
    // Multiply by the conversion factor
    return meters * 3.28084;  // 1 meter ≈ 3.28084 feet :contentReference[oaicite:0]{index=0}
}

//ques 6 import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner=new Scanner(System.in);

    System.out.print("Enter the value of a: ");
    double a=scanner.nextDouble();
    
    System.out.print("Enter the value of b: ");
    double b=scanner.nextDouble();
    
    System.out.print("Enter the value of c: ");
    double c=scanner.nextDouble();
    
    double discriminant=b*b-4*a*c;
    
    if(discriminant<0){
        System.out.println("There will be no real solutions");
    }
    else if(discriminant==0){
        double solution=-b/(2*a);
        System.out.println("There will be one real solution which is :"+solution);
    }
    else{
        double solution1 = (-b + Math.sqrt(discriminant)) / (2 * a);
        double solution2 = (-b - Math.sqrt(discriminant)) / (2 * a);
        System.out.println("There will be two real solutions: "+solution1+" and "+solution2);
    }
    scanner.close();
}

}