feat: Add FunctionCC5 class with printSquare method

WHAT the code does:
- Defines a `FunctionCC5` class with a static method `printSquare(int num)`.
- `printSquare()` computes the square of the input number and prints the result.
- `main()` calls `printSquare(5)` as a demonstration.

WHY this matters:
- Demonstrates **user-defined methods** in Java.
- Reinforces arithmetic operations and method parameter passing.
- Shows how to separate computation logic into reusable methods.

HOW it works:
1. `printSquare(5)` → computes `5 * 5 = 25`.
2. Prints → `"Square of 5 is: 25"`.

Tips & gotchas:
- Currently prints result only; could be extended to return the value for reuse.
- Works only for integers; using `long` or `BigInteger` avoids overflow for large inputs.
- Negative inputs are valid (e.g., `-3` → `9`).
- Method name `printSquare` is descriptive, aligning with best practices.

Use-cases:
- Educational example for methods with parameters.
- Utility method for math-related applications.
- Starter function to extend into more math operations (cube, power, etc.).
- Interview prep for **basic function implementation**.

Short key: class-function cc5-print square.

Signed-off-by: https://github.com/Someshdiwan <[email protected]>

Author: Someshdiwan

Section10Methods/PracticeProblems/src/FunctionCC5.java

@@ -1,21 +1,20 @@
-/*Printing Output from Functions
-A Method can also directly print output to the console using print statements.
-        However, this doesn't provide any data back to the caller in a way that can be used elsewhere in the program.
-The primary purpose here is to display information, not to provide data for further processing.
-
-Check the example below which gives the same output as the code above:*/
-
-public class FunctionCC5
-{
-    public static void main(String[] args)
-    {
+public class FunctionCC5 {
+    public static void main(String[] args) {
         printSquare(5);
     }
 
-    // User-defined method to print the square of a number
-    public static void printSquare(int num)
-    {
+    // User-defined method to print the square of a number.
+    public static void printSquare(int num) {
         int squareResult = num * num;
         System.out.println("Square of " + num + " is: " + squareResult);
     }
-}
+}
+
+/* Printing Output from Functions:
+A Method can also directly print output to the console using print statements.
+
+However, this doesn't provide any data back to the caller in a way that can be used elsewhere in the program.
+The primary purpose here is to display information, not to provide data for further processing.
+
+Check the example above which gives the same output as the above.
+*/