chore: finished README.md

Author: TatsuyaRyujin

lesson_04/evanphilakhong/README.md

@@ -50,4 +50,15 @@ public static boolean isPrime(int num) {
 
 ## Explanation
 
-The C++ implementation is using a function named `isPrime` that takes a single parameter `num` representing the number the function is checking if it's a prime number or not. The function returns `True` if the number is **Prime**
+The **C++** implementation is using a function named `isPrime` that takes a single parameter `num` representing the number the function is checking if it's a prime number or not. The function returns `True` if the number is **Prime**, otherwise it returns `False`.
+
+The **Java** implementation is using a function named `isPrime` that takes a single parameter `num` representing the numer the function is checking if it's a prime number or not. The function returns `True` if the number is **Prime**, otherwise it returns `False`.
+
+### Differences
+
+1. **File Stucture**:
+    - In **C++**, you have the ability to create a header file to store libraries and function declorations. While Java has no such thing.
+    - **Java** forces you to work in a `Class` while, **C++** lets you work outside of `Classes`
+
+2. **Syntax**:
+    - The syntax for printing to the console/output is a little different. **C++** uses `cout` while, **Java** uses `System.out.print();`