The answer
This implies looking at combinations, which usually requires nested loops: one loop for the first item, and an inner loop for the second item.
Translating English Logic into a Loop Structure
How do I translate 'check every pair'?
More FAQs in Translating English Logic into a Loop Structure
If the English logic implies looking at every item ('for each item'), use a for loop. If it implies waiting for a state change ('keep going until X happens'), use a while loop.
Writing pseudocode or English steps clarifies the algorithmic logic and separates problem-solving from syntax struggles.
'Find all' requires accumulating results (like pushing to a new array) and letting the loop finish. 'Find first' requires returning or breaking immediately upon finding the match.
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