Write a program to input a number in Octal form and convert it Decimal form? (10 in octal then 8 in decimal, 8^0, 8^1, ….)

74)  Write a program to input a number in Octal form and convert it Decimal form? (10 in octal then 8 in decimal, 8⁰, 8¹, ….)

import java.util.*;

public class Octal_to_Decimal

{

    public static void main(String args[ ])

  {

           Scanner sc = new Scanner (System.in);

           System.out.println("Enter a OCTAL number");

           int b = sc.nextInt();

           int a = b;

           int m = 0;

           int r = 0;

           while(a>0)

           {

               int d = a%10;

               int x = (int)Math.pow(8,m);

               r = r+(x*d);

               m++;

               a=a/10;

           }

           System.out.println(b+" in DECIMAL = "+r);

  }

}

Output :

octal-to-decimal

          Write a program to input a number in Binary form and convert it Decimal form? (1010 in binary then 10 in decimal, 2⁰ , 2¹……)