How to define global variables in C language

Yes, global variables can be defined in C language using the following syntax: Specify the data type of the variable (such as char, int, float) and declare the variable name (identifier) ​​using a semicolon (;) Ending statement For example, define a global character array named name: char name[];

Definition of global variables in C language

Global variables in C are accessible throughout the program, and their life cycle is from the start of the program to the end. To define global variables, you can use the following syntax:

 <code class="c"> ;</code>

For example, define a global character array called name :

 <code class="c">char name[];</code>

Detailed description:

• Data type: Specify the data type of the variable, such as char , int , float , etc.
• Variable name: The unique name that identifies the variable.
• Semicolon (;): End the variable declaration statement.

Notes:

• Global variables must be defined outside the function.
• The default values ​​of global variables are undefined and need to be explicitly initialized in the program.
• Since global variables can be accessed throughout the program, they should be used with caution to avoid unnecessary conflicts and errors.

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