What is the use of wchar_t in general programming?

Question

Today I was learning some C++ basics and came to know about wchar_t. I was not able to figure out, why do we actually need this datatype, and how do I use it?

Answer 1

The wchar_t data type is used to display wide characters that will occupy 16 bits. This datatype occupies "2 or 4" bytes.

Mostly the wchar_t datatype is used when international languages like japanese are used.