diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..0e40fe8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,3 @@
+
+# Default ignored files
+/workspace.xml
\ No newline at end of file
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 6989bdc..c9209a5 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -3,7 +3,7 @@
   <component name="ProjectKey">
     <option name="state" value="project://63537948-39a4-48a0-9c97-34259a0fa913" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_12" default="true" project-jdk-name="12" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="true" project-jdk-name="1.8" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/out" />
   </component>
 </project>
\ No newline at end of file
diff --git a/out/production/HelloJava/Calculater.class b/out/production/HelloJava/Calculater.class
new file mode 100644
index 0000000..c9b7243
Binary files /dev/null and b/out/production/HelloJava/Calculater.class differ
diff --git a/out/production/HelloJava/CalculaterMain.class b/out/production/HelloJava/CalculaterMain.class
new file mode 100644
index 0000000..02a3677
Binary files /dev/null and b/out/production/HelloJava/CalculaterMain.class differ
diff --git a/out/production/HelloJava/Main.class b/out/production/HelloJava/Main.class
new file mode 100644
index 0000000..498023d
Binary files /dev/null and b/out/production/HelloJava/Main.class differ
diff --git a/src/Calculater.java b/src/Calculater.java
new file mode 100644
index 0000000..94f2e37
--- /dev/null
+++ b/src/Calculater.java
@@ -0,0 +1,65 @@
+import java.util.ArrayList;
+
+public class Calculater {
+    private double num1;
+    private double num2;
+    private double interest;
+    private Double arr[];
+
+    public double addition(double num1, double num2) {
+        this.num1 = num1;
+        this.num2 =  num2;
+        return this.num1 + this.num2;
+    }
+
+    public double substraction(double num1, double num2) {
+        this.num1 = num1;
+        this.num2 =  num2;
+        return this.num1 - this.num2;
+    }
+
+    public double division(double num1, double num2) {
+        this.num1 = num1;
+        this.num2 =  num2;
+        return this.num1 / this.num2;
+    }
+
+    public double multiplication(double num1, double num2) {
+        this.num1 = num1;
+        this.num2 =  num2;
+        return this.num1 * this.num2;
+    }
+
+    public int modulas(double num1, double num2) {
+        this.num1 = num1;
+        this.num2 =  num2;
+        return (int) (this.num1 % this.num2);
+    }
+
+    public double percentage(double num, double interest){
+        this.num1 = num;
+        this.interest = interest;
+        return num * (interest / 100.0);
+    }
+    public ArrayList<Double> findLargeAndSmall(Double arr[]){
+        this.arr = arr;
+        double large = 0;
+        double small = 0;
+        ArrayList<Double> numList = new ArrayList<>();
+
+        for(int i=0; i<this.arr.length; i++){
+            double temp = arr[i];
+            if(temp > large){
+                large = temp;
+            }
+            if(temp < small){
+                small = temp;
+            }
+        }
+
+        numList.add(0, small);
+        numList.add(1, large);
+        return numList;
+    }
+
+}
diff --git a/src/CalculaterMain.java b/src/CalculaterMain.java
new file mode 100644
index 0000000..0ee71ae
--- /dev/null
+++ b/src/CalculaterMain.java
@@ -0,0 +1,100 @@
+import java.util.ArrayList;
+import java.util.Scanner;
+
+public class CalculaterMain {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        double num1, num2;
+        String oper;
+
+        System.out.println("Available Operations :\n");
+        System.out.println("+\t--> Addition\n-\t--> Substraction\n/\t--> Division\n*\t--> Multiplication\nmod\t--> Modulas\nLarge Or Small Num \t--> los\nInterest Rate\t--> %");
+
+        System.out.println("\nEnter Operator : ");
+        oper = scanner.nextLine();
+        Calculater calc = new Calculater();
+
+        switch (oper.toLowerCase()){
+            case "+":
+                System.out.println("Enter Number 1 : ");
+                num1 = scanner.nextDouble();
+
+                System.out.println("Enter Number 2 : ");
+                num2 = scanner.nextDouble();
+
+
+                System.out.println("Addition : " + calc.addition(num1, num2));
+                break;
+
+            case "-":
+                System.out.println("Enter Number 1 : ");
+                num1 = scanner.nextDouble();
+
+                System.out.println("Enter Number 2 : ");
+                num2 = scanner.nextDouble();
+
+                System.out.println("Addition : " + calc.substraction(num1, num2));
+                break;
+
+            case "/":
+                System.out.println("Enter Number 1 : ");
+                num1 = scanner.nextDouble();
+
+                System.out.println("Enter Number 2 : ");
+                num2 = scanner.nextDouble();
+
+                System.out.println("Addition : " + calc.division(num1, num2));
+                break;
+
+            case "*":
+                System.out.println("Enter Number 1 : ");
+                num1 = scanner.nextDouble();
+
+                System.out.println("Enter Number 2 : ");
+                num2 = scanner.nextDouble();
+
+                System.out.println("Addition : " + calc.multiplication(num1, num2));
+                break;
+
+            case "mod":
+                System.out.println("Enter Number 1 : ");
+                num1 = scanner.nextDouble();
+
+                System.out.println("Enter Number 2 : ");
+                num2 = scanner.nextDouble();
+
+                System.out.println("Addition : " + calc.modulas(num1, num2));
+                break;
+
+            case "%":
+                System.out.println("Enter Value : ");
+                num1 = scanner.nextDouble();
+
+                System.out.println("Enter Interest Rate : ");
+                num2 = scanner.nextDouble();
+
+                System.out.println("Interest Rate : " + calc.percentage(num1, num2));
+                break;
+
+            case "los":
+                System.out.println("Enter how many numbers to input");
+                int inp = scanner.nextInt();
+
+                Double[] arr = new Double[inp];
+
+                for(int i=0; i<arr.length; i++){
+                    System.out.println("Enter Num " + i + " : ");
+                    arr[i] = scanner.nextDouble();
+                }
+
+                ArrayList<Double> res = calc.findLargeAndSmall(arr);
+                System.out.println("Small Number : " + res.get(0));
+                System.out.println("Large Number : " + res.get(1));
+
+                break;
+
+            default:
+                System.out.println("Invalid Operator");
+        }
+    }
+}
diff --git a/src/Main.java b/src/Main.java
index 01ecfbe..0a31d1d 100644
--- a/src/Main.java
+++ b/src/Main.java
@@ -9,9 +9,14 @@ public static void main(String[] args) {
         Scanner number1 = new Scanner(System.in);
         Scanner number2 = new Scanner(System.in);
         Scanner operator = new Scanner(System.in);
-        System.out.println("Enter Operator - + / * ");
+
+        System.out.println("Available Operations :\n");
+        System.out.println("+\t--> Addition\n-\t--> Substraction\n/\t--> Division\n*\t--> Multiplication\nmod\t--> Modulas");
+
+        System.out.println("\nEnter Operator : ");
         oper = operator.nextLine();
 
+
         switch (oper){
             case "+":{
                 System.out.println("Enter Value 1 ");
@@ -46,6 +51,13 @@ public static void main(String[] args) {
                 b = number2.nextInt();
                 System.out.println("Divide : " + divide(a ,b));
             }
+            case "mod": {
+                System.out.println("Enter Value 1 ");
+                a = number1.nextInt();
+                System.out.println("Enter Value 2 ");
+                b = number2.nextInt();
+                System.out.println("Modulas : " + modulas(a ,b));
+            }
             break;
             default:
                 System.out.println("You Entered wrong operator");
@@ -69,4 +81,8 @@ private static int sub(int a, int b) {
     private static int addition(int a, int b) {
         return a + b;
     }
+
+    private static int modulas(int a, int b) {
+        return a % b;
+    }
 }