Page 48 - Programming With Python 3

An Introduction to STEM Programming with Python — 2019-09-03a Page 35
Chapter 3 — Strings, Input, and Interactive Programs

len(expression) Function
Free
len() — returns the length of a string, list, tuple, or a map.

https://docs.python.org/3/library/functions.html#len
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1| name = "El. Supremo"
2| print("Your name is", len(name), "letters long.")

Your name is 10 letters long.
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Converting from a string to a number and back

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The float() and int() functions will actually try to convert any expression or type into a float or
an integer. If the expression can't be converted, an error will be thrown. See discussion in Chapter 4 for
how to trap the error and continue the program.
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int(expression) Function
The int() function will convert a string or a floating-point number to an integer. If
it is unable to make the conversion an error will be thrown. Free

https://docs.python.org/3/library/functions.html#int
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float(expression) Function

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