The last one we held your hand, so let’s try one on your own.

As an example of iteration, we have the first program ever to run on a stored-program computer (the EDSAC). It was written and run by David Wheeler in the computer laboratory at Cambridge University, England, on May 6th, 1948, to calculate and print a simple list of squares like the following:

0 0 1 1 2 4 3 9 4 16 5 25 6 36 7 49 8 64 9 81

On the left, there are numbers from 0 to 9. On the right are their squares. For example, for the number 9, 9 * 9 = 81.



In square.cpp, write this using a while loop in C++.

If you notice the Run button spinning continuously or a “Lost connection to Codecademy” message in this exercise, you may have an infinite loop! If the stop condition for our loop is never met, we will create an infinite loop which stops our program from running anything else. To exit out of an infinite loop in an exercise, refresh the page — then fix the code for your loop.

Take this course for free

Mini Info Outline Icon
By signing up for Codecademy, you agree to Codecademy's Terms of Service & Privacy Policy.

Or sign up using:

Already have an account?