FAQ: Data Structures - For Each Loop


This community-built FAQ covers the “For Each Loop” exercise from the lesson “Data Structures”.

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This exercise can be found in the following Codecademy content:

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FAQs on the exercise For Each Loop

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Instead of:

for (Integer temperature : weeklyTemperatures) {

can we do:

for (int temperature : weeklyTemperatures) {

And if not, why not?


I was wondering this myself. If you use int instead of Integer, the code still executes and it shows you the proper output, but the “grader” tells you it’s wrong. It seems like it’s not testing the output, but your input.