Java Basics: Defining variables of different types

Attention:

In the definition long type the value is the end need to add L or L;

In defining a single-precision floating-point data variable it is necessary to add F or f at the end;

Scope:

The variable is defined in the curly braces, and the range of the curly braces is the scope of the variable. Two variables of the same name cannot be defined in the same scope.

Initialize value:

No initialization value can be used directly (as long as the value is assigned before use, it does not have to be given at the time of definition)

Suggest defining a variable on one line

(Multiple can be defined, but not recommended)

 

Java Basics: Defining variables of different types