You have learned how number bases work. You can convert between decimal, binary, octal, and hexadecimal. You understand why computers use binary and why programmers use hex.
You have solved problems involving bit counting, bit reversal, power-of-two checking, and binary addition. You know the bit tricks that replace loops with single operations. You can read two's complement and understand how negatives are stored.
These skills will come up in bit manipulation problems, systems programming, and performance optimization. Keep practicing the problems in the problem set to build fluency. Next section: we will explore more advanced topics that build on this foundation.