Find the smallest value in a list using a loop in Python. The keyword None: example + exercise 10

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Python tutorial in English 37
Python programming language tutorial in English

In order to find the smallest value in a list we use a loop, an "if" statement and a keyword None in Python.
At the very beginning we create a variable that we call "smallest" and we assign to it a keyword None. None - is an absence of value, a lack of value, this is nothing.
Use of the keyword "is" in Python.