Added Decimal to Octal conversion.

Decimal to octal.java

@@ -0,0 +1,19 @@
+#import java.util.*;
+class Decimal_Octal
+{
+  public static void main()
+  {
+    Scanner sc=new Scanner(System.in);
+    int n,k,d,s=0,c=0;
+    n=sc.nextInt();
+    k=n;
+    while(k!=0)
+    {
+      d=k%8;
+      s+=d*(int)Math.pow(10,c++);
+      k/=8;
+    }
+    System.out.println("Decimal number:"+n);
+    System.out.println("Octal equivalent:"+s);
+  }
+}