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foundations/09_sumAll : Clarify negative input handling #653

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docs: add note about adding negative inputs in Exercise 09
shauryaa108 Jun 21, 2026
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docs: add note about adding negative inputs in Exercise 09
shauryaa108 Jun 21, 2026
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6 changes: 5 additions & 1 deletion foundations/09_sumAll/README.md
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Expand Up @@ -11,4 +11,8 @@ sumAll(1, 4) // returns the sum of 1 + 2 + 3 + 4 which is 10

- How will you ensure you're summing all integers within the correct range, no matter the order of the inputs?

- Think about your sum's starting value. Then, how can you make sure every single number from the smaller input to the larger one (including both) gets added to it?
- Think about your sum's starting value. Then, how can you make sure every single number from the smaller input to the larger one (including both) gets added to it?

## Note

- This exercise only accepts positive integers. If there is a negative input, then it should return an error.