programming-basics: why int=012 works like 10?

public class Literal{
public static void main(String[] args) {
int a=012;
int c=a*2;
System.out.print(c);
}
}

output:
20

Please describe that how above program printing 20 on console.

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Posted On : 2014-07-30 01:07:42.0

Saksham Kumar
73433939909

Answers

It is simple, If you put integer value starting with 0(zero), It´s taken as octal base(8). e.g. If you change the value of a to 0124 and print the value of a on console, It will print 84. See the below explanation:

int a=012--> 2*8^0 + 1*8^1 --> 2+8 -->10

int a=0124--> 4*8^0 + 2*8^1 + 1*8^2--> 4+16+64 -->84

So i hope you now got the point why your program printing 20.

Posted On : 2014-07-30 01:21:55
Satisfied : 4 Yes 0 No

Rishi Kumar
523188250047
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