Question

Which of the following is incorrect?

(a) x = 0b101

(b) x = 0x4f5

(c) x = 19023

(d) x = 03964

I had been asked this question in class test.

This intriguing question comes from Numeric Types topic in portion Variable Names, Operators, Data Types & Numeric Types of Python

Answer 1

The correct option is (d) x = 03964

To explain I would say: Numbers starting with a 0 are octal numbers but 9 isn’t allowed in octal numbers.