C Language: Variables

Constants represent data that cannot be modified, so variables represent data that needs to be modified frequently, and variables should be used when the value of a data needs to change or be uncertain.

How do I use variables?

1. Defining variables

Format: Variable type variable name

Variable type: Indicates what type of variable can be stored by the variable that I define

Variable name: It is an identifier that identifies us to open up this storage area in memory so that we can use it later

int score;

This line of code in memory to open up a piece of 4 bytes of storage area, its name is score; This area is used to hold data of type int.

2. Initialize: The first assignment of a variable is called initialization

score = 15;

This line of code is putting 15 in the storage space named score

3. Use

printf ("score=%d\n", score);

C Language: Variables