Question

How the class template is differ from function template?

Answer 1

Answer:

For normal code, you would use a class template when you want to create a class that is parameterised by a type, and a function template when you want to create a function that can operate on many different types. ... Expression templates allow you to speed up certain types of code or create domain specific languages.

Answer 2

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For normal code, you would use a class template when you want to create a class that is parameterised by a type, and a function template when you want to create a function that can operate on many different types.

Function templates are also able to do type-deduction, which can be useful for creating factory functions: