Learn in the textbookImplementation and Review
DefinitionA code review (コードレビュー) is a check in which finished source code is read without being run, to find errors, convention violations and hard-to-follow writing.
ExplanationHaving someone other than the author read the code makes it easier to catch errors the author missed through their own assumptions. The earlier a defect is found, before the code even runs, the narrower the fix and the lower the cost of rework.
AnalogyIt is like asking a colleague to read your draft before you hand it in and mark typos and unclear passages in red.
Memory hookreview = re (again) + view (look): the word itself says to look over finished work once more.