A data member of a class can be qualified as static.
The properties of static member variable are similar to that of ‘C’ static variable.
Static variables are normally used to maintain values common to the entire class.
General syntax for declaration of Static member variable is
static data_type member_variable_name;
A static data member of a class is initialized to zero when the first object is created.
Only one copy of that member is created for entire class and is shared by all objects of that class.
It is visible only within the class. But its life time is the entire program
The type and scope of each static member variable must be defined outside the class definition.
Syntax is
data-type class-name : : variable-name =value;
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