# Python Conditional Statements and loops

## Python conditional statements and loops [44 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 program to find those numbers which are divisible by 7 and multiples of 5, between 1500 and 2700 (both included).
Click me to see the sample solution

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
Click me to see the sample solution

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.
Click me to see the sample solution

4. Write a Python program to construct the following pattern, using a nested for loop.

```* * * * * * * * * * * * * * * * * * * * * * * * *
```

Click me to see the sample solution

5. Write a Python program that accepts a word from the user and reverses it.
Click me to see the sample solution

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
Click me to see the sample solution

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'}]
Click me to see the sample solution

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
Click me to see the sample solution

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
Click me to see the sample solution

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
Click me to see the sample solution

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]]
Click me to see the sample solution

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).
Click me to see the sample solution

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
Click me to see the sample solution

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

Click me to see the sample solution

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.

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.
Click me to see the sample solution

17. Write a Python program to print the alphabet pattern 'A'.
Expected Output:

```  ***
*   *
*   *
*****
*   *
*   *
*   *
```

Click me to see the sample solution

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

``` ****
*   *
*   *
*   *
*   *
*   *
****
```

Click me to see the sample solution

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

``` *****
*
*
****
*
*
*****
```

Click me to see the sample solution

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

```  ***
*   *
*
* ***
*   *
*   *
***
```

Click me to see the sample solution

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

``` *
*
*
*
*
*
*****
```

Click me to see the sample solution

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

```  *       *
*       *
* *   * *
*   *   *
*       *
*       *
*       *
```

Click me to see the sample solution

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

```  ***
*   *
*   *
*   *
*   *
*   *
***
```

Click me to see the sample solution

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

``` ****
*   *
*   *
****
*
*
*
```

Click me to see the sample solution

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

``` ****
*   *
*   *
****
* *
*  *
*   *
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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

``` *****
*
*
*
*
*
*
```

Click me to see the sample solution

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

``` *   *
*   *
*   *
*   *
*   *
*   *
***
```

Click me to see the sample solution

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

``` *   *
*   *
* *
*
* *
*   *
*   *
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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.
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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

Click me to see the sample solution

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.
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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

Click me to see the sample solution

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
```

Click me to see the sample solution

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
```

Click me to see the sample solution

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

Combining Lists Using Zip:

• Takes multiple collections and returns a new collection.
• The new collection contains items where each item contains one element from each input collection.
• It allows us to transverse multiple collections at the same time.
```name = 'abcdef'
suffix = [1,2,3,4,5,6]
zip(name, suffix)
--> returns (a,1),(b,2),(c,3),(d,4),(e,5),(f,6)
```

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