Variables in Python are an essential part of programming logic, helping store and manage data. However, one of the early challenges new developers face is understanding how variables behave in different scopes especially the distinction between local and global variables.
What Are Local Variables?
Local variables are defined inside a function and are accessible only within that function. They are created when the function is called and removed from memory once the function completes its execution. These variables exist temporarily and serve the purpose of handling function-specific logic.
def greet():
message = "Hello, World!"
print(message)
greet()
What Are Global Variables?
On the other hand, global variables are declared outside any function and are accessible throughout the program. These variables maintain their value across different function calls, making them useful when multiple functions need to access or modify the same data.
status = "Active"
def check_status():
print(status)
check_status()
Overlapping Names and Shadowing
If a local variable shares the same name as a global one, the local variable will take precedence within its function. This is called variable shadowing. It’s important to be cautious in such scenarios to avoid unexpected results or logic errors.
value = 10
def modify():
value = 5
print("Inside function:", value)
modify()
print("Outside function:", value)
Read more:- global variable python
