  Course Content

# Numeral Systems 101

2. Octal Numeral system

Numeral Systems 101

##   Harder Converting

You know a lot now! You can convert a lot of numbers from different numeral systems, but here we are going to dive deeper into built-in python functions for converting. Let's start with converting to a decimal one. Here is the function `int()` is useful.

For instance, to convert binary numbers to decimal representation you should start with `0b`. Like int(`0b`10011010010), where `10011010010` number should be converted.

To do the same with the octal numeral system you have to use similar syntax int(`0o`2322) where `2322` should be converted.

I suppose you guessed the syntax for converting from a hexadecimal numeral system: int(`0X`4D2), where `4D2` number should be converted.

It can be implemented not only with `int()`, such syntax is available for other numeral systems too:

1. Convert number `4EAF` from the hexadecimal numeral system to the octal.
2. Convert number `2547` from the octal numeral system to the binary.
3. Convert number `1101011` from the binary numeral system to the decimal.
4. Convert number `2001` from the decimal numeral system to the hexadecimal. 