will get you:
int 123 int 83
This is because
0123 is octal notation (because of the
0 at the beginning), while
123 is decimal.
For more information, you can take a look at the Integer section of the manual.
An even trickier question would have been to ask about
079, for instance :
will get you :
int 79 int 7
9 is not a valid digit in octal 😉 )