diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index e571935..0843c20 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -4,5 +4,6 @@
 <li>William Rupert Waboke (@waboke)
 <li>Nanribet Yohanna Kutwal, (@Nan-yohanna), Mathematics_department, U23MTH1011</li>
 <li>Owaniyi Oluwafemi Micheal, (@Chuckycipher), Cybersecurity_department, U23CYS1072</li>
+  <li>Ali-Musaddiq Abubakar Aliyu, (@Chuckycipher), Cybersecurity_department, U23CYS1072</li>
 </ol>
 <li>Ahmad Muhammad Idris, (@LuffytheGoat), Physics with Electronics, U23PE1008</li>
diff --git a/Calculator.java b/Calculator.java
new file mode 100644
index 0000000..fcf773e
--- /dev/null
+++ b/Calculator.java
@@ -0,0 +1,49 @@
+import java.util.Scanner;
+
+public class Calculator {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+
+        System.out.println("Enter first number: ");
+        double num1 = scanner.nextDouble();
+
+        System.out.println("Enter second number: ");
+        double num2 = scanner.nextDouble();
+
+        System.out.println("Enter an operator\n" +
+        "(Addition,\n" +
+        "subtraction,\n" +
+        "multiplication,\n" +
+        "Division): ");
+
+        char operator = scanner.next().charAt(0);
+
+        double result;
+
+        switch (operator) {
+            case 'addition':
+                result = num1 + num2;
+                break;
+            case 'subtraction':
+                result = num1 - num2;
+                break;
+            case 'multiplication':
+                result = num1 * num2;
+                break;
+            case 'division5
+            ':
+                if (num2 != 0) {
+                    result = num1 / num2; // Corrected division order
+                } else {
+                    System.out.println("Error! Division by zero.");
+                    return;
+                }
+                break;
+            default:
+                System.out.println("Invalid operator!");
+                return;
+        }
+
+        System.out.println("The result is: " + result);
+    }
+}jj