The Programming Model
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
A programming model is designed for humans to read and write: a syntax of keywords, operators, and punctuation giving precise meaning, with the resulting text called source code.
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A payroll program's source spells its rules in words and symbols a person can audit.
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Precision is the entry fee — the syntax forgives nothing.