C++ Initialization

Initialization of a variable refers to providing its initial value at the time of construction. Refer to Initialization - cppreference.com.

Aggregate Initialization

See Aggregates and Aggregate initialization - cppreference.com for meaning of aggregate in C++ as well as what aggregate initialization means.

Value Initialization

It means to call the default constructor, and otherwise zero initialize. It is done using empty braces, as T object{} or T object = {}. See Value initialisation