Built-in Functions

Python has many useful built-in functions that can simplify some operations. For instance, these are the following:

min(x, y, ...) - minimum element of x, y, ...
max(x, y, ...) - maximum element of x, y, ...
abs(x) - absolute value of number x
round(x, n) - rounds number x to n digits
pow(x, n) - exponentiation (x to the power n).

For example, you may need to investigate the minimum price of certain list of prices after applying discounts. Or you may need to convert kilometers into miles without extra digits.


              123456789
            
# List of prices with discounts
prices = [400*0.7, 345*0.8, 270*0.95, 320*0.85]
# The lowest price
print(min(prices))

# Distance in kilometers
dist = 5762.4
# Converting into miles and rounding to 2 digits
print(round(dist/1.609, 2))

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Sezione 4. Capitolo 1

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Introduction to Data Analysis in Python