Learning immediately: https://edu.csdn.net/course/play/20589/257716?utm_source=blogtoedu
Variables: a data memory for storing computer
Declare variables: declare variables that apply to the system memory, you need to specify the name and type of the variable declaration syntax is as follows:
[Variable Type] [Variable Name];
For example: int age; // declare integer type a name for the age of (int) variable.
Assignment of variables: variables "=" assignment
Form: variable name = value
It said it would assign a value to a variable right-hand side of the equal sign on the left
For example: int number; // represents an integer type opened up room in memory, and named number.
number = 50; // the number 50 in this integer into.
Easier way: variable type variable name = value; // declare a variable represents, while the value assigned to the variable.
For example: string name = "xxx"; /// string type declaration of a variable name, and assigned to "xxx"
Variable use: you must be declared (defined) by assignment and finally use , the use of variables in the absence of an assignment, the system will error.
Note: Variable not allowed to repeat the amount declared (defined), but may be repeated assignment. After assigning a new value before the value is gone, replaced by a new value to.
