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Exercises & solutions part 2: Loops

In this section, we will find some basic exercises on loops and lists. All exercises have solutions. Remember that the exercises are for beginners, so the code is not optimized.

Exercise: Print 10 times​

Create a program that, given a text, prints it 10 times. For example, given the text Hello world, it should display it ten times.

Exercise: Print odd numbers​

Create a program that, given a positive integer, prints all the odd numbers from 1 up to that number. For example, given the number 10, the program will print the numbers 1, 3, 5, 7, 9.

Exercise: Countdown​

Create a program that, given a positive integer, prints the countdown from that number to zero. For example, given the number 10, the program will print the numbers 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0.

Exercise: Copy and reverse​

Create a program that, given a list of numbers, copies the values to another list and reverses them. For example, given the list [1, 2, 3, 4, 5], the program should print:

  • The original list is: [1, 2, 3, 4, 5]
  • The copy is: [5, 4, 3, 2, 1]

Exercise: Sum of even and odd numbers​

Create a program that, given a list of positive integers, prints the sum of the even numbers and the sum of the odd numbers. For example, given the following numbers [3, 2, 3, 4, 5, 6, 1, 7], the sum of even numbers is 12, and the sum of odd numbers is 19.

Exercise: Right triangle​

Create a program that, given the height, prints a right triangle like the following:

// Height: 5
*
**
***
****
*****

Exercise: Christmas Tree​

Create a program that, given the height, prints a Christmas tree like the following:

// Height: 5
    *
   ***
  *****
 *******
*********

Exercise: Christmas Tree with numbers​

Create a program that, given the height, prints a Christmas tree like the following:

// Height: 5
    1
   222
  33333
 4444444
555555555

Exercise: Fibonacci sequence​

Create a program that prints the first 'n' Fibonacci numbers. For example, if the value of 'n' is 10, the printed numbers will be: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34.