JAVA Code snippet: Explanation of octal / radix 8 numbers

Question

Need Explanation of this Code :

public static void main(String[] args) { 
        int a=010; 
        int b=07; 
        System.out.println(a); 
        System.out.println(b); 
}

OutPut :

8

7

Have a look on this question: [Why is 08 not a valid integer literal in Java?](https://stackoverflow.com/questions/7218760/why-is-08-not-a-valid-integer-literal-in-java) — LuCio, Aug 28 '18 at 07:17
https://en.wikipedia.org/wiki/Octal Can you clarify what you are having trouble with? — Peter Lawrey, Aug 28 '18 at 08:31

score 2 · Accepted Answer · answered Aug 28 '18 at 07:13

An int prepended with 0in Java represents an Octal, which means you count to 7, then represent the (decimal) value of 8 as 10, and continue form there.

As an example / for comparison:

Decimal       Octal
8             10
9             11
10            12
11            13
16            20
17            21
24            30
25            31
64            100
65            101
etc...

JAVA Code snippet: Explanation of octal / radix 8 numbers

1 Answers1