PYTHON FUNCTIONS (Assg:4)

1. What does the len() function do in Python? Write a code example using len() to find the length of a list.

The len() function in Python is used to determine the number of elements in a data structure such as a list, tuple, dictionary, or string. It returns an integer representing the total number of items.

PROGRAM-1

list=[2,4,6,8] # CREATING A SIMPLE LIST

length=len(list) # FINDING THE LENGTH OF THE LIST

print("The length of the list ", list, "is :", length) # DISPLAYING THE RESULT

OUTPUT-1

2. Write a Python function greet(name) that takes a person's name as input and prints "Hello, [name]!".

PROGRAM-2

def greet(name): # DEFINING THE GREETING FUNCTION print(f"Hello, {name}!")

#EXAMPLE USAGE greet("Liana")

OUTPUT-2

3. Write a Python function find_maximum(numbers) that takes a list of integers and returns the maximum value without using the built-in max() function. Use a loop to iterate through the list and compare values.

PROGRAM-3

def find_maximum(numbers):

if not numbers:

    return None
    
   
maxvalue=numbers[0]

    
for num in numbers:

    if num>maxvalue:
    
        maxvalue=num

return maxvalue

numbers=[8,7,3,10,23,6]

result=find_maximum(numbers)

print(f"The maximum value in the list is : {result}")

OUTPUT-3

4. Explain the difference between local and global variables in a Python function. Write a program where a global variable and a local variable have the same name and show how Python differentiates between them.

PROGRAM-4

message="I am the Global Variable"

def local():

message="I am the Local Variable"

print("Inside the function:",message)

def modify_global():

global message

message="I am the modified Global Variable"

local()

print("Outside the function:",message)

modify_global()

print("After modifying the variable:",message)

OUTPUT-4

5. Create a function calculate_area(length, width=5) that calculates the area of a rectangle. If only the length is provided, the function should assume the width is 5. Show how the function behaves when called with and without the width argument.

PROGRAM-5

def calculate_area(length,width=5):

return length*width

area1=calculate_area(10,8)

print("The area without width argument is:",area1)

area2=calculate_area(10)

print("The area with width argument as 5 by default is:",area2)

OUTPUT-5