Complete Modern C++ - Fold Expressions - Binary Folds

The video tutorial explains fold expressions in C++, focusing on binary left and right folds. It covers the use of initializer values and identity elements, and how fold expressions can be expanded. The tutorial also discusses operators that can be used with fold expressions, including their default values when parameter packs are empty. Examples demonstrate checking for even numbers using fold expressions, and the video concludes with a challenge to implement a printf-like function using fold expressions.

What are the default values for empty parameter packs when using different operators?

Describe how to modify functions to take a predicate in the context of fold expressions.

What challenge is presented at the end of the text regarding fold expressions?