Page 521 - ComputerScience_Class_11

Output

Local variable inside the function: 50
Global variable outside the function: 100

Difference Between Local and Global Variables
In Python, local variables and global variables are both used to store values, but they have different scopes and
lifetimes. Understanding the key differences between them is important for effectively managing variables in your
program.

Aspect Local Variable Global Variable

Scope Accessible only within the function. Accessible throughout the program.
Lifetime Created and destroyed during function execution. Exists as long as the program runs.
Access Can only be accessed inside the function. Can be accessed both inside and outside functions.
Modification Cannot be modified outside the function. Can be modified with global inside a function.

Memory Takes memory only during function execution. Occupies memory until the program ends.

RETURN STATEMENT IN FUNCTION
The return statement is used to send a result from a function back to the calling program. When a function reaches
a return statement, it stops executing and returns the specified value. This allows the function to provide output that
can be used elsewhere in the program.
Syntax of return statement:

def function_name():
# Code inside the function
return value # Return value to the caller
Where:
• value is the result or data that the function returns to the caller.

• once the return statement is executed, the function ends and the control is transferred back to where the function
was called.

Program 7: Write a program to check if a number is even or odd using a return statement.
Program 7.py

File Edit Format Run Options Window Help

def check_even_odd(number):
if number % 2 == 0:
return "Even" # Return "Even" if the number is divisible by 2
else:
return "Odd" # Return "Odd" if the number is not divisible by 2

result = check_even_odd(7)
print("The number is:", result)

For Advance Learners: Functions in Python 519