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Python Conditional Statements and loops

Python conditional statements and loops [44 exercises with solution]

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1. Write a Python program to find those numbers which are divisible by 7 and multiples of 5, between 1500 and 2700 (both included).
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2. Write a Python program to convert temperatures to and from Celsius and Fahrenheit.
[ Formula : c/5 = f-32/9 [ where c = temperature in celsius and f = temperature in fahrenheit ]
Expected Output :
60°C is 140 in Fahrenheit
45°F is 7 in Celsius
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3. Write a Python program to guess a number between 1 and 9.
Note : User is prompted to enter a guess. If the user guesses wrong then the prompt appears again until the guess is correct, on successful guess, user will get a "Well guessed!" message, and the program will exit.
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4. Write a Python program to construct the following pattern, using a nested for loop.

* 
* *
* * *
* * * *
* * * * *
* * * *
* * *
* *
*

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5. Write a Python program that accepts a word from the user and reverses it.
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6. Write a Python program to count the number of even and odd numbers in a series of numbers
Sample numbers : numbers = (1, 2, 3, 4, 5, 6, 7, 8, 9) 
Expected Output :
Number of even numbers : 5
Number of odd numbers : 4
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7. Write a Python program that prints each item and its corresponding type from the following list.
Sample List : datalist = [1452, 11.23, 1+2j, True, 'w3resource', (0, -1), [5, 12], {"class":'V', "section":'A'}]
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8. Write a Python program that prints all the numbers from 0 to 6 except 3 and 6.
Note : Use 'continue' statement.
Expected Output : 0 1 2 4 5
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9. Write a Python program to get the Fibonacci series between 0 and 50.
Note : The Fibonacci Sequence is the series of numbers :
0, 1, 1, 2, 3, 5, 8, 13, 21, ....
Every next number is found by adding up the two numbers before it.
Expected Output : 1 1 2 3 5 8 13 21 34
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10. Write a Python program that iterates the integers from 1 to 50. For multiples of three print "Fizz" instead of the number and for multiples of five print "Buzz". For numbers that are multiples of three and five, print "FizzBuzz".
Sample Output :
fizzbuzz
1
2
fizz
4
buzz
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11. Write a Python program that takes two digits m (row) and n (column) as input and generates a two-dimensional array. The element value in the i-th row and j-th column of the array should be i*j.
Note :
i = 0,1.., m-1
j = 0,1, n-1.

Test Data : Rows = 3, Columns = 4
Expected Result : [[0, 0, 0, 0], [0, 1, 2, 3], [0, 2, 4, 6]]
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12. Write a Python program that accepts a sequence of lines (blank line to terminate) as input and prints the lines as output (all characters in lower case).
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13. Write a Python program that accepts a sequence of comma separated 4 digit binary numbers as its input. The program will print the numbers that are divisible by 5 in a comma separated sequence.
Sample Data : 0100,0011,1010,1001,1100,1001
Expected Output : 1010
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14. Write a Python program that accepts a string and calculates the number of digits and letters.
Sample Data : Python 3.2
Expected Output :
Letters 6
Digits 2

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15. Write a Python program to check the validity of passwords input by users.
Validation :

  • At least 1 letter between [a-z] and 1 letter between [A-Z].
  • At least 1 number between [0-9].
  • At least 1 character from [$#@].
  • Minimum length 6 characters.
  • Maximum length 16 characters.

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16. Write a Python program to find numbers between 100 and 400 (both included) where each digit of a number is an even number. The numbers obtained should be printed in a comma-separated sequence.
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17. Write a Python program to print the alphabet pattern 'A'.
Expected Output:

  ***                                                                   
 *   *                                                                  
 *   *                                                                  
 *****                                                                  
 *   *                                                                  
 *   *                                                                  
 *   *

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18. Write a Python program to print the alphabet pattern 'D'.
Expected Output:

 ****                                                                   
 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
 **** 

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19. Write a Python program to print the alphabet pattern 'E'.
Expected Output:

 *****                                                                  
 *                                                                      
 *                                                                      
 ****                                                                   
 *                                                                      
 *                                                                      
 *****

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20. Write a Python program to print the alphabet pattern 'G'.
Expected Output:

  ***                                                                   
 *   *                                                                  
 *                                                                      
 * ***                                                                  
 *   *                                                                  
 *   *                                                                  
  *** 

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21. Write a Python program to print the alphabet pattern 'L'.
Expected Output:

 *                                                                      
 *                                                                      
 *                                                                      
 *                                                                      
 *                                                                      
 *                                                                      
 *****

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22. Write a Python program to print the alphabet pattern 'M'.
Expected Output:

  *       *                                                             
  *       *                                                             
  * *   * *                                                             
  *   *   *                                                             
  *       *                                                             
  *       *                                                             
  *       *

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23. Write a Python program to print the alphabet pattern 'O'.
Expected Output:

  ***                                                                   
 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
  *** 

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24. Write a Python program to print the alphabet pattern 'P'.
Expected Output:

 ****                                                                   
 *   *                                                                  
 *   *                                                                  
 ****                                                                   
 *                                                                      
 *                                                                      
 *  

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25. Write a Python program to print the alphabet pattern 'R'.
Expected Output:

 ****                                                                   
 *   *                                                                  
 *   *                                                                  
 ****                                                                   
 * *                                                                    
 *  *                                                                   
 *   *

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26. Write a Python program to print the following patterns.
Expected Output:

  ****                                                                  
 *                                                                      
 *                                                                      
  ***                                                                   
     *                                                                  
     *                                                                  
 **** 
 
 ooooooooooooooooo                                                       
ooooooooooooooooo                                                       
ooooooooooooooooo                                                       
oooo                                                                    
oooo                                                                    
oooo                                                                    
ooooooooooooooooo                                                       
ooooooooooooooooo                                                       
ooooooooooooooooo                                                       
             oooo                                                       
             oooo                                                       
             oooo                                                       
ooooooooooooooooo                                                       
ooooooooooooooooo                                                       
ooooooooooooooooo 

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27. Write a Python program to print the alphabet pattern 'T'.
Expected Output:

 *****                                                                  
   *                                                                    
   *                                                                    
   *                                                                    
   *                                                                    
   *                                                                    
   *  

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28. Write a Python program to print the alphabet pattern 'U'.
Expected Output:

 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
 *   *                                                                  
  *** 

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29. Write a Python program to print the alphabet pattern 'X'.
Expected Output:

 *   *                                                                  
 *   *                                                                  
  * *                                                                   
   *                                                                    
  * *                                                                   
 *   *                                                                  
 *   *

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30. Write a Python program to print the alphabet pattern 'Z'.
Expected Output:

*******                                                                 
     *                                                                  
    *                                                                   
   *                                                                    
  *                                                                     
 *                                                                      
*******

Click me to see the sample solution

31. Write a Python program to calculate a dog's age in dog years.
Note: For the first two years, a dog year is equal to 10.5 human years. After that, each dog year equals 4 human years.
Expected Output:

Input a dog's age in human years: 15                                    
The dog's age in dog's years is 73

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32. Write a Python program to check whether an alphabet is a vowel or consonant.
Expected Output:

Input a letter of the alphabet: k                                       
k is a consonant.

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33. Write a Python program to convert a month name to a number of days.
Expected Output:

List of months: January, February, March, April, May, June, July, August
, September, October, November, December                                
Input the name of Month: February                                       
No. of days: 28/29 days 

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34. Write a Python program to sum two integers. However, if the sum is between 15 and 20 it will return 20.

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35. Write a Python program that checks whether a string represents an integer or not.
Expected Output:

Input a string: Python                                                  
The string is not an integer.  

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36. Write a Python program to check if a triangle is equilateral, isosceles or scalene.
Note :
An equilateral triangle is a triangle in which all three sides are equal.
A scalene triangle is a triangle that has three unequal sides.
An isosceles triangle is a triangle with (at least) two equal sides.
Expected Output:

Input lengths of the triangle sides:                                    
x: 6                                                                    
y: 8                                                                    
z: 12                                                                   
Scalene triangle  

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37. Write a Python program that reads two integers representing a month and day and prints the season for that month and day.
Expected Output:

Input the month (e.g. January, February etc.): july                     
Input the day: 31                                                       
Season is autumn  

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38. Write a Python program to display the astrological sign for a given date of birth.
Expected Output:

Input birthday: 15                                                      
Input month of birth (e.g. march, july etc): may                        
Your Astrological sign is : Taurus 

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39. Write a Python program to display the sign of the Chinese Zodiac for the given year in which you were born.
Expected Output:

Input your birth year: 1973                                             
Your Zodiac sign : Ox  

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40. Write a Python program to find the median of three values.
Expected Output:

Input first number: 15                                                  
Input second number: 26                                                 
Input third number: 29                                                  
The median is 26.0   

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41. Write a Python program to get the next day of a given date.
Expected Output:

Input a year: 2016                                                      
Input a month [1-12]: 08                                                
Input a day [1-31]: 23                                                  
The next date is [yyyy-mm-dd] 2016-8-24   

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42. Write a Python program to calculate the sum and average of n integer numbers (input from the user). Input 0 to finish.

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43. Write a Python program to create the multiplication table (from 1 to 10) of a number.
Expected Output:

Input a number: 6                                                       
6 x 1 = 6                                                               
6 x 2 = 12                                                              
6 x 3 = 18                                                              
6 x 4 = 24                                                              
6 x 5 = 30                                                              
6 x 6 = 36                                                              
6 x 7 = 42                                                              
6 x 8 = 48                                                              
6 x 9 = 54                                                              
6 x 10 = 60 

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44. Write a Python program to construct the following pattern, using a nested loop number.
Expected Output:

1
22
333
4444
55555
666666
7777777
88888888
999999999

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