PYTHON LESSON
for Loop
for iterates over each item in a sequence.
Iterate items directly, not manual indexing.
Mutating collection while iterating.
Read this next
for Loop is used in many real programs. Right now you are in Logic.
Core idea:
for iterates over each item in a sequence.
Read the example code on this page. Then write your own short version.
Tip:
Iterate items directly, not manual indexing.
Watch out for:
Mutating collection while iterating.
Your challenge:
Print squares from 1 to n.
Use the editor in the challenge lab. When your output looks correct and there is no error, press the green button to unlock the next topic.
Example code
Copy this example if it helps. Change it so it matches for Loop.
# Topic: for Loop
def main():
sample = "edit me"
# TODO: apply for Loop concept here
result = sample
print("Result:", result)
if __name__ == "__main__":
main()
Challenge
Print squares from 1 to n.
Before you can finish: your output should include at least 10 characters; at least 1 non-empty line(s); no crash traceback—fix errors until the program runs cleanly.
Use Run. Read the output. Change your code until the task is done.
Starter reference
# Challenge starter for for Loop
def solve():
# Write your solution here
pass
print("Update solve() and run")Your code
The first Run may load Python in your browser (one-time). Later runs are faster.