What is code for convert binary number to natural number ?

Question

Like :10—2;11—3 etc

Answer 1

That depends on the programming language.

The process is the same, of course.
https://www.wikihow.com/Convert-from-Binary-to-Decimal
https://www.rapidtables.com/convert/number/binary-to-decimal.html

Answer 2

Thanks,it helps a lot 😊.