What's the purpose of using braces (i.e. {}) for a single-line if or loop?

Question

I\'m reading some lecture notes of my C++ lecturer and he wrote the following:

1. Use Indentation // OK
2. Never rely on operator preced

Answer 1

If you are a compiler, it doesn't make any difference. Both are the same.

But for programmers, the first one is more clear, easy to read and less error-prone.