binodcoder
diff --git a/‎src/binod/AreaSquare.java
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diff --git a/‎src/binod/FunctionDemo.java
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+package binod;
+public class FunctionDemo {
+    public static void printHelloWorld() {
+        System.out.println("Hello World");
+    }
+
+    public static double calculateSquare(double side) {
+        double area = side * side;
+        return area;
+    }
+
+    public static void swap(int a, int b) {
+        //swap
+        int temp = a;
+        a = b;
+        b = temp;
+        System.out.println("a=" + a);
+        System.out.println("b=" + b);
+    }
+
+    public static int findProduct(int a, int b) {
+        int product = a * b;
+        return product;
+    }
+
+    public static int findFactorial(int n) {
+        int fact = 1;
+        for (int i = 1; i <= n; i++) {
+            fact *= i;
+        }
+        return fact;
+    }
+
+    public static double findBinomialCoefficient(int n, int r) {
+        double nfac = findFactorial(n);
+        double rfac = findFactorial(r);
+        double nrfac = findFactorial(n - 1);
+        double bc = nfac / (rfac * nrfac);
+        return bc;
+    }
+
+    public static boolean isPrime(int n) {
+        //1 is neither composite nor prime
+        //checking for 2
+        if (n == 2) {
+            return true;
+        }
+        for (int i = 2; i <= Math.sqrt(n); i++) {
+            if (n % i == 0) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public static void printPrime(int range) {
+        for (int i = 2; i <= range; i++) {
+            if (isPrime(i) == true) {
+                System.out.println(i);
+            }
+        }
+    }
+
+    public static void main(String[] args) {
+//        Scanner scanner = new Scanner(System.in);
+//        System.out.println("Enter side of a square");
+//        double side = scanner.nextDouble();
+//        printHelloWorld();
+//        double area = calculateSquare(side);
+//        System.out.println("The area of square is: " + area);
+//        swap(1, 2);
+//        System.out.println(findProduct(2, 3));
+//        System.out.println(findFactorial(3));
+//        System.out.println(findBinomialCoefficient(4, 2));
+//        System.out.println(isPrime(12));
+        printPrime(10);
+    }
+}