Problems on Function

1. Print a Greeting Message

Problem: Write a function greet() that prints "Hello, Python!".

Explanation: A simple function with no parameters.

Example Output:

Hello, Python!

2. Function to Add Two Numbers

Problem: Write a function add(a, b) that returns the sum of two numbers.

Example Input:

add(5, 7)

Output:

3. Function to Find Maximum of Two Numbers

Problem: Write a function maximum(a, b) that returns the larger number.

Example Input:

maximum(10, 15)

Output:

4. Function to Check Even or Odd

Problem: Write a function is_even(n) that returns "Even" if the number is even and "Odd" if it is odd.

Example Input:

is_even(7)

Output:

Odd

5. Function to Calculate Factorial

Problem: Write a function factorial(n) to calculate factorial of a number using a loop.

Example Input:

factorial(5)

Output:

6. Function to Check Prime Number

Problem: Write a function is_prime(n) that returns True if a number is prime, otherwise False.

Example Input:

is_prime(13)

Output:

True

7. Function to Find Sum of List

Problem: Write a function sum_list(lst) that returns the sum of all numbers in a list.

Example Input:

sum_list([2, 4, 6])

Output:

8. Function to Reverse a String

Problem: Write a function reverse_string(s) that returns the reversed string.

Example Input:

reverse_string("Python")

Output:

nohtyP

9. Function with Default Argument

Problem: Write a function greet_person(name="Guest") that prints "Hello, <name>!".

Example Input:

greet_person("Alice")

Output:

Hello, Alice!

Example Input (without argument):

greet_person()

Output:

Hello, Guest!

10. Function to Count Vowels in String

Problem: Write a function count_vowels(s) that returns the number of vowels in a string.

Example Input:

count_vowels("Python is fun")

Output:

11. Function to Find Maximum in a List

Problem: Write a function max_in_list(lst) that returns the largest number in a list.

Example Input:

max_in_list([4,7,2,9,5])

Output:

12. Function to Calculate Power

Problem: Write a function power(base, exp) that returns base raised to the power of exp.

Example Input:

power(2, 3)

Output:

13. Function to Count Words in a Sentence

Problem: Write a function count_words(sentence) that returns the number of words in a sentence.

Example Input:

count_words("Python is fun to learn")

Output:

14. Function to Check Armstrong Number

Problem: Write a function is_armstrong(n) that returns True if a number is an Armstrong number, otherwise False.

Example Input:

is_armstrong(153)

Output:

True

15. Function to Check Palindrome String

Problem: Write a function is_palindrome(s) that returns True if a string is a palindrome, otherwise False.

Example Input:

is_palindrome("radar")

Output:

True

16. Function to Count Occurrences of Character

Problem: Write a function count_char(s, ch) that counts the number of times a character occurs in a string.

Example Input:

count_char("banana", "a")

Output:

17. Function to Merge Two Lists

Problem: Write a function merge_lists(lst1, lst2) that returns a combined list.

Example Input:

merge_lists([1,2,3], [4,5])

Output:

[1,2,3,4,5]

18. Function to Remove Duplicates from List

Problem: Write a function remove_duplicates(lst) that returns a list with duplicates removed.

Example Input:

remove_duplicates([1,2,2,3,3,3])

Output:

[1,2,3]

19. Function to Reverse a List

Problem: Write a function reverse_list(lst) that returns the reversed list.

Example Input:

reverse_list([1,2,3,4])

Output:

[4,3,2,1]

20. Function to Find Palindrome Numbers in a List

Problem: Write a function palindrome_numbers(lst) that returns a list of all palindrome numbers from a given list.

Example Input:

palindrome_numbers([121,123,454,567,787])

Output:

[121,454,787]