Octal to binary conversion using Java
Octal to binary conversion using Java :
Step 1 : Ask the user to enter an octal number.
[Logic for conversion from octal number to decimal number]
Step 2 : Declare two variables, one for storing decimal value and second for storing value of the power.
Step 3 : Use the while loop till octal number entered by user is greater than 0.
Step 4 : Use a statement to get the last digit of the octal number.
Step 5 : Use the statement for adding each digit by multiplying by the power of 8 and power starts with 0 till p-1 (where p is the number of digits in the octal number) by using power function.
Step 6 : Use the statement for removing last digit of the octal number and taking only remaining number and increase the value of the power by 1.
Step 7 : Repeat the steps 3 to 6 till the value of the loop does not gets false.
[Logic for conversion from decimal number to binary number]
Step 8 : Now declare an array and a variable for pointing index value of the array.
Step 9 : Use the while loop till the converted decimal number is greater than 0.
Step 10 : Divide the decimal number by 2 and store the remainder in the array and update the decimal number with the quotient.
Step 11 : Repeat the steps 9 and 10 till the decimal number is greater than 0.
Step 12 : Print the array in reverse order.
Code in Java :
//Java program to convert octal number to binary number
public class Octal_To_Binary
public static void main(String args)
//scanner class object creation
Scanner sc = new Scanner(System.in);
//input from user
System.out.print("Enter a octal number : ");
int octal = sc.nextInt();
//Declaring variable to store decimal number
int decimal = 0;
//Declaring variable to use in power
int n = 0;
//writing logic for the octal to decimal conversion
while(octal > 0)
int temp = octal % 10;
decimal += temp * Math.pow(8, n);
octal = octal/10;
int binary = new int;
int i = 0;
//writing logic for the decimal to binary conversion
while(decimal > 0)
int r = decimal % 2;
binary[i++] = r;
decimal = decimal/2;
System.out.print("Binary number : ");
for(int j = i-1 ; j >= 0 ; j--)
//closing scanner class(not compulsory, but good practice)
Enter a octal number : 216
Binary number : 1 0 0 0 1 1 1 0