Octal is a number system where a number is represented in powers of 8. So all the integers can be represented as an octal number. Also, all the digit in an octal number is between 0 and 7. In java, we can store octal numbers by just adding 0 while initializing. They are called Octal Literals. The data type used for storing is int.
The method used to convert Decimal to Octal is Integer.toOctalString(int num)
Syntax:
public static String toOctalString(int num)
Parameters: The method accepts a single parameter num of integer type which is required to be converted to a string.
Return Value: The function returns a string representation of the integer argument as an unsigned integer in base 8.
Example 1
Java
import java.io.*;class GFG { public static void main(String[] args) { // Variable Declaration int a; // storing normal integer value a = 20; System.out.println("Value of a: " + a); // storing octal integer value // just add 0 followed octal representation a = 024; System.out.println("Value of a: " + a); // convert octal representation to integer String s = "024"; int c = Integer.parseInt(s, 8); System.out.println("Value of c: " + c); // get octal representation of a number int b = 50; System.out.println( "Octal Representation of the number " + b + " is: " + Integer.toOctalString(b)); }} |
Value of a: 20 Value of a: 20 Value of c: 20 Octal Representation of the number 50 is: 62
The time complexity is O(1), meaning it is constant time.
The auxiliary space complexity is also O(1).
Example 2: The different arithmetic operation can also be performed on this octal integer. Operation is the same as performed on the int data type.
Java
// Arithmetic operations on Octal numbersimport java.io.*;class GFG { public static void main(String[] args) { int a, b; // 100 a = 0144; // 20 b = 024; System.out.println("Value of a: " + a); System.out.println("Value of b: " + b); System.out.println("Addition: " + (a + b)); System.out.println("Subtraction: " + (a - b)); System.out.println("Multiplication: " + (a * b)); System.out.println("Division: " + (a / b)); }} |
Value of a: 100 Value of b: 20 Addition: 120 Subtraction: 80 Multiplication: 2000 Division: 5
