The amount of memory to store an object of a certain type can be returned using the sizeof operator:
sizeof(name)
It yields the size of an object in bytes, and the parameter name indicates the object type or the object itself.
For example, sizeof(int)represents a value of 2 or 4 depending on the machine.
sizeof(float) will always equal 4.
The fundamental types in C++ are integer types, floating-point types, and the void type.
The types used for integers and floating-point numbers are collectively referred to as arithmetic types.
You can use arithmetic operators on them.
The void type is used for expressions that do not represent a value.
A function call can thus take a void type.