Permutaiton by defining function and using it

permutaitonusingfunction.java

@@ -0,0 +1,35 @@
+import java.util.*;
+public class Program
+{
+    public static void display(int n,int r,int npr)
+    {
+        System.out.println(n+" P "+r+" is "+npr);
+
+    }
+
+
+    public static int fact(int x)//public static used to define the function
+    //fact(int x) defined in such a way that x is the input value
+    {
+        //function written detailed
+        int fact=1;
+        for(int i=1;i<=x;i++)
+        {
+            fact=fact*i;
+        }
+        return fact;
+        //returning the function value
+    }
+    public static void main(String[] args) 
+    {
+		Scanner scn=new Scanner(System.in);
+        int n=scn.nextInt();
+        int r=scn.nextInt();
+        //taking input
+        int nfact=fact(n);
+        int nmrfact=fact(n-r);
+        int npr=nfact/nmrfact;
+        display(n,r,npr);
+
+	}
+}