Scanner reader = new Scanner(System.in);

Week 1: Types, condition clauses and loops/6. Print a greeting message

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+// use Scanner class
+// to read user input
+import java.util.Scanner;
+
+public class Example {
+    public static void main(String[] args) {
+        System.out.print("Input your name:");
+
+        Scanner reader = new Scanner(System.in);
+        String name = reader.nextLine();
+
+        System.out.println("Greetings, " + name);
+    }
+}
+Example output:
+Input your name: Mike Madeup
+Greetings, Mike Madeup
+
+
+
+
+
+//eg2
+// int in user input
+//Integer.valueOf
+import java.util.Scanner;
+
+public class Example {
+    public static void main(String[] args) {
+        Scanner reader= new Scanner(System.in);
+
+        
+        System.out.print("Give the first number: ");
+        int first = Integer.valueOf(reader.nextLine());
+
+        System.out.print("Give the second number: ");
+        int second = Integer.valueOf(reader.nextLine());
+
+
+        int sum = first + second;
+        System.out.println("Sum: " + sum);
+    }
+}
+Example output:
+Give the first number: 5
+Give the second number: 11
+Sum: 16
+
+
+
+
+
+//eg3
+//double in user input
+//Double.valueOf
+import java.util.Scanner;
+
+public class Example {
+    public static void main(String[] args) {
+        Scanner reader = new Scanner(System.in);
+        
+        System.out.print("Give the first number: ");
+        double first = Double.valueOf(reader.nextLine());
+
+        System.out.print("Give the second number: ");
+        double second = Double.valueOf(reader.nextLine());
+
+        System.out.print("Give the third number: ");
+        double third = Double.valueOf(reader.nextLine());
+
+        double average= (first + second + third) / 3;
+        System.out.println("Average: " + average);
+    }
+}
+Example output:
+Give the first number: 2
+Give the second number: 4.5
+Give the third number: 7
+Average: 4.5
+
+
+
+
+
+
+
+
+"""
+Write a program that asks the user to enter their name and then prints a welcome message to the user, as shown in the example below.
+
+In the example, the user's input is given in bold. Note that the output must be exactly as shown in the example.
+
+Input your name: Ethan Example
+Welcome to the course, Ethan Example!!!
+"""
+
+
+
+import java.util.Random;
+import java.util.Scanner;
+
+
+
+public class Test{
+    public static void main(String[] args){
+        final Random r = new Random();
+        
+        Scanner reader = new Scanner(System.in);
+
+        System.out.print("Input your name: ");
+        String name = reader.nextLine();
+
+
+        System.out.println("Welcome to the course, " + name + "!!!");
+        
+    }
+}
+
+
+
+
+
+"""output
+
+Testing with input Ethan Example
+Input your name: Ethan Example
+Welcome to the course, Ethan Example!!!
+
+Testing with input Niko Nonexistent
+Input your name: Niko Nonexistent
+Welcome to the course, Niko Nonexistent!!!
+
+Testing with input Maddie Madeup
+Input your name: Maddie Madeup
+Welcome to the course, Maddie Madeup!!!
+
+
+
+"""