Difference Between Local And Global Variable In Python
distinguishing local and global variables in Python
Difference Between Local And Global Variable In Python
In Python, a local variable is defined inside a function and can only be accessed within that specific function, while a global variable is defined outside of any function and can be accessed and modified from anywhere in the code. Local variables have a limited scope, existing only within the function where they are defined, while global variables have a broader scope and can be accessed throughout the entire program. It is recommended to use local variables whenever possible to avoid potential conflicts and to improve code readability and maintainability.
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1 - Local variables are declared inside a function or method and can only be accessed within that specific function or method. Global variables, on the other hand, are declared outside of any function and are accessible from anywhere in the code.
2) Local variables have a limited scope and are destroyed once the function or method execution is completed. Global variables remain in memory for the entire duration of the program unless explicitly deleted.
3) Local variables are useful for temporary storage and for preventing naming conflicts within different parts of the code. Global variables should be used sparingly to store values that need to be accessed across multiple functions or modules.
4) When a local variable is declared with the same name as a global variable within a function, the local variable takes precedence and masks the global variable within that function. This is known as variable shadowing.
5) Using global variables excessively can make the code harder to debug and maintain, as changes to the global variable can have unintended consequences across different parts of the program.
6) It is considered a good practice to use local variables whenever possible to encapsulate data and limit the scope of variables to where they are actually needed.
7) Understanding the difference between local and global variables is essential for writing efficient and well organized code, especially in larger programs with multiple functions and modules.
8) Providing training on local and global variables in Python will help students grasp the concept of variable scope and better structure their code to prevent potential issues related to variable naming and access.
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