Added codes, datasets and Jupyter notebooks directory.

Codes/Code-B4 (Apache Scala).md

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+# B4 - Apache Scala
+
+✅ Tested and working as intended.
+
+---
+
+1. Open your `Terminal` and run the following commands:
+
+```shell
+source ~/.bashrc # Not really needed but still
+start-master.sh # Considering the shell script is defined in PATH
+spark-shell # This will start scala CLI
+```
+
+2. Enter paste mode:
+
+```scala
+:paste
+```
+
+3. Paste the following code:
+
+```scala
+object EvenOddCheck {
+  def main(args: Array[String]): Unit = {
+    val number = 15
+    if (number % 2 == 0) {
+      println(s"$number is even")
+    } else {
+      println(s"$number is odd")
+    }
+  }
+}
+```
+
+> [!NOTE]
+> IF USER INPUT REQUIRED, USE THIS CODE INSTEAD:
+
+```scala
+import scala.io.StdIn
+
+object AddTwoNumbers {
+  def main(args: Array[String]): Unit = {
+    println("Enter the first number:")
+    val num1 = StdIn.readInt()
+    println("Enter the second number:")
+    val num2 = StdIn.readInt()
+    val sum = num1 + num2
+    println(s"The sum of $num1 and $num2 is $sum")
+  }
+}
+```
+
+4. Press `Ctrl + D` to exit paste mode
+
+5. Execute:
+
+```scala
+EvenOddCheck.main(Array.empty[String])
+```
+
+> [!NOTE]
+> TO EXECUTE USER INPUT WALA CODE, RUN:
+
+```scala
+AddTwoNumbers.main(Array.empty[String])
+```
+
+> [!TIP]
+> Additional Scala codes available at [here](https://git.kska.io/sppu-te-comp-content/DataScienceAndBigDataAnalytics/src/branch/main/Codes/Code-B4%20%28Apache%20Scala%29%20-%20Alternatives.md).
+
+---