Why does for i in range(1,3): only loop two times instead of three times in Python?

Why does for i in range(1,3): only loop two times instead of three times in Python Programming Language By DDSRY?

• The range() function only does numbers from the first to the last (not including the last).
• So it stop at two, not three, in the above.
• This turn out to be the most common way to do this kind of loop.

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