Day 10 scanner and variables

package week2training;
import java.util.Scanner;

public class Day10A {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int number1;
        double number2;
        String txt1;

        System.out.println("Enter integer value for number 1: ");
        number1 = sc.nextInt();
        System.out.println("Enter decimal value for number 2: ");
        number2 = sc.nextDouble();
        sc.nextLine(); // if scanner before text is used for numeric data type
        System.out.println("Enter text value: ");
        txt1 = sc.nextLine();

        System.out.println("num1: " + number1);
        System.out.println("num2: " + number2);
        System.out.println("text1: " + txt1);
    }
}

//--------------------------------------------

package week2training;
import java.util.Scanner;

public class Day10B {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int dayNumber;

        System.out.print("Enter day number(1-7): ");
        dayNumber = sc.nextInt();

        if (dayNumber == 1) {
            System.out.println("Sunday");
        } else if (dayNumber == 2) {
            System.out.println("Monday");
        } else if (dayNumber == 3) {
            System.out.println("Tuesday");
        } else if (dayNumber == 4) {
            System.out.println("Wednesday");
        } else if (dayNumber == 5) {
            System.out.println("Thursday");
        } else if (dayNumber == 6) {
            System.out.println("Friday");
        } else if (dayNumber == 7) {
            System.out.println("Saturday");
        } else {
            System.out.println("please try again");
        }

        if (dayNumber >= 2 && dayNumber <= 6) {
            System.out.println("Weekdays");
        } else {
            System.out.println("Weekends");
        }
    }
}


//------------------------more sample--------------------
package week2training;
import java.util.Scanner;
public class Day10C {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int grade;
        String gradeResult;

        System.out.print("Enter final grade: ");
        grade = sc.nextInt();

        if (grade >= 98 && grade <= 100) {
            gradeResult = "1.00";
        } else if (grade >= 92 && grade <= 97) {
            gradeResult = "1.50";
            // continue the 3 remaining ranges refer to the pic at messenger
        } else {
            gradeResult = "invalid";
        }
        System.out.println(gradeResult);
    }
}

//-------------color color---------------------------
package week2training;
import java.util.Scanner;

public class Day10D {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String color;

        System.out.print("Enter color name: ");
        color = sc.nextLine();

        switch (color) {
            case "red":
            case "yellow":
            case "blue":
                System.out.println("This is a primary color");
                break;
            case "orange":
            case "green":
            case "violet":
                System.out.println("This is a secondary color");
                break;
            default:
                System.out.println("color is not on database please try again");
        }
    }
}