The format of the definition statement is:
Class-name Variable-name = Expression ;
The left side of the assignment symbol is a variable declaration.
It initializes the variable with the instance returned by the expression on the right side of the assignment symbol.
It represents a class that is bound to a variable.
It is an identifier used to access a variable.
Assignment symbol =
It is a symbol for setting a value in a variable.
The expression creates an instance that is set in the variable. The class of the generated instance must be the same as the class name.
The end of a definition statement is represented by a semicolon.