# Python functions - Exercises, Practice, Solution

## Python functions [21 exercises with solution]

[An editor is available at the bottom of the page to write and execute the scripts.  Go to the editor]

1. Write a Python function to find the maximum of three numbers.
Click me to see the sample solution

2. Write a Python function to sum all the numbers in a list.
Sample List : (8, 2, 3, 0, 7)
Expected Output : 20
Click me to see the sample solution

3. Write a Python function to multiply all the numbers in a list.
Sample List : (8, 2, 3, -1, 7)
Expected Output : -336
Click me to see the sample solution

4. Write a Python program to reverse a string.
Sample String : "1234abcd"
Expected Output : "dcba4321"
Click me to see the sample solution

5. Write a Python function to calculate the factorial of a number (a non-negative integer). The function accepts the number as an argument.
Click me to see the sample solution

6. Write a Python function to check whether a number falls within a given range.
Click me to see the sample solution

7. Write a Python function that accepts a string and counts the number of upper and lower case letters.
Sample String : 'The quick Brow Fox'
Expected Output :
No. of Upper case characters : 3
No. of Lower case Characters : 12
Click me to see the sample solution

8. Write a Python function that takes a list and returns a new list with distinct elements from the first list.
Sample List : [1,2,3,3,3,3,4,5]
Unique List : [1, 2, 3, 4, 5]
Click me to see the sample solution

9. Write a Python function that takes a number as a parameter and checks whether the number is prime or not.
Note : A prime number (or a prime) is a natural number greater than 1 and that has no positive divisors other than 1 and itself.
Click me to see the sample solution

10. Write a Python program to print the even numbers from a given list.
Sample List : [1, 2, 3, 4, 5, 6, 7, 8, 9]
Expected Result
: [2, 4, 6, 8]
Click me to see the sample solution

11. Write a Python function to check whether a number is "Perfect" or not.
According to Wikipedia : In number theory, a perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is, the sum of its positive divisors excluding the number itself (also known as its aliquot sum). Equivalently, a perfect number is a number that is half the sum of all of its positive divisors (including itself).
Example : The first perfect number is 6, because 1, 2, and 3 are its proper positive divisors, and 1 + 2 + 3 = 6. Equivalently, the number 6 is equal to half the sum of all its positive divisors: ( 1 + 2 + 3 + 6 ) / 2 = 6. The next perfect number is 28 = 1 + 2 + 4 + 7 + 14. This is followed by the perfect numbers 496 and 8128.
Click me to see the sample solution

12. Write a Python function that checks whether a passed string is a palindrome or not.
Note: A palindrome is a word, phrase, or sequence that reads the same backward as forward, e.g., madam or nurses run.
Click me to see the sample solution

13. Write a Python function that prints out the first n rows of Pascal's triangle.
Note : Pascal's triangle is an arithmetic and geometric figure first imagined by Blaise Pascal.

Sample Pascal's triangle : Each number is the two numbers above it added together
Click me to see the sample solution

14. Write a Python function to check whether a string is a pangram or not.
Note : Pangrams are words or sentences containing every letter of the alphabet at least once.
For example : "The quick brown fox jumps over the lazy dog"
Click me to see the sample solution

15. Write a Python program that accepts a hyphen-separated sequence of words as input and prints the words in a hyphen-separated sequence after sorting them alphabetically.
Sample Items : green-red-yellow-black-white
Expected Result
: black-green-red-white-yellow
Click me to see the sample solution

16. Write a Python function to create and print a list where the values are the squares of numbers between 1 and 30 (both included).
Click me to see the sample solution

17. Write a Python program to create a chain of function decorators (bold, italic, underline etc.).
Click me to see the sample solution

18. Write a Python program to execute a string containing Python code.
Click me to see the sample solution

19. Write a Python program to access a function inside a function.
Click me to see the sample solution

20. Write a Python program to detect the number of local variables declared in a function.
Sample Output:
3
Click me to see the sample solution

21. Write a Python program that invokes a function after a specified period of time.
Sample Output:
Square root after specific miliseconds:
4.0
10.0
158.42979517754858
Click me to see the sample solution

## Python Code Editor:

More to Come !

Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.

﻿

## Python: Tips of the Day

Unzipping:

```name = 'abcdef'
suffix = [1,2,3,4,5,6]
result = zip(name, suffix)
--> returns (a,1),(b,2),(c,3),(d,4),(e,5),(f,6)
unzipped = zip(*result)
```

We are closing our Disqus commenting system for some maintenanace issues. You may write to us at reach[at]yahoo[dot]com or visit us at Facebook