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Writing useful context

Three short headings at the top of a room skip the slow start of every “can you look at this?”.

People can help faster when they know what you are trying to do, what happens instead, and what you have already tried.

Paste this into a Markdown document
# What I’m trying to do
Return the indices of two numbers that add up to target.

# What happens instead
[3, 3] with target 6 returns -1.

# What I’ve tried
Checked the loop bounds. Added a log on line 8.