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 UWA week 35 (2nd semester, week 6) ↓
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5:41am Thu 1st Sep, Christopher M.

> Hi, did you mean isdigit()? If so, it's defined in the <ctype.h> header file.
Yes, they probably want isdigit(). To be pedantic, we generally say it's *declared* in the ctype.h header file, but *defined* (implemented) in the standard library. ______ Though, in honesty, to gain some efficiency, most ctype functions are frequently defined as pre-processor macros in the header file.

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