feat(2.8.3): Finished Unit 2 Lesson 8 Activity 3

- Using Math API
--- Math.round()
--- Math.abs()
- finding the difference between two numbers and rounding it

.vscode/launch.json

@@ -1,5 +1,12 @@
 {
     "configurations": [
+        {
+            "type": "java",
+            "name": "U2_L8_Activity_Three",
+            "request": "launch",
+            "mainClass": "Unit2.U2_L8_Activity_Three",
+            "projectName": "my-app"
+        },
         {
             "type": "java",
             "name": "U2_L8_Activity_Two",

a.txt

@@ -1,15 +1,16 @@
-Write a program that calculates the slope between two coordinates: (x1, y1) and (x2, y2). The program should take four decimal inputs from the user, in the order of x1, x2, y1, y2. Then print the slope.
+Write a program which calculates the difference between two doubles which are entered by the user, then round the difference to the nearest integer. The answer should be a positive integer regardless of the order in which the doubles are entered.
 
-Note: slope formula looks like this:
+Hint: The Math.round() function can be used to round a double value to the nearest integer.
 
-Sample run:
+Sample run 1:
 
-Enter the first x-coordinate:
-3.9
-Enter the second x-coordinate:
-5.1
-Enter the first y-coordinate:
-4.8
-Enter the second y-coordinate:
-1.2
-Slope: -3.0000000000000004
+Enter two doubles:
+>2.2
+>9.6
+Difference: 7
+Sample run 2:
+
+Enter two integers:
+>-4.5
+>12.56
+Difference: 17

src/main/java/Unit2/U2_L8_Activity_Three.java

@@ -0,0 +1,20 @@
+package Unit2;
+
+import java.util.Scanner;
+
+public class U2_L8_Activity_Three {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Enter two doubles:");
+        System.out.print(">");
+        double num1= scanner.nextDouble();
+        System.out.print(">");
+        double num2= scanner.nextDouble();
+
+        int difference = (int) Math.round(Math.abs(num2-num1));
+
+        System.out.println("Difference: "+difference);
+        scanner.close();
+    }
+}