In this video, we cover a handful of the built-in functions with Python 3. For a full list, see: https://docs.python.org/3/library/functions.html
We cover absolute value (abs()), the help() functions, max(), min() ...which are how to find maximum and minimum of a list, how to round a number with round(), as well as ceil() and floor(), even though these last two are NOT built in, it just seemed like a good time to bring them up. Finally, we cover converting floats, ints, and strings to and from each other.
There are still quite a few other built in functions to Python 3, but the others are not really meant for a basics tutorial.
Sample code for the built in functions that are covered in the video:
exNum1 = -5 exNum2 = 5 print(abs(exNum1)) if abs(exNum1) == exNum2: print('True!')
The Help function:
This is probably one of the most under-utilized commands in Python, many people do not even know that it exists. With help(), you can type it with empty parameters to engage in a search, or you can put a specific function in question in the parameter.
import time # will work in a typical installation of Python, but not in the embedded editor help(time)Max and Min:
How to find the maximum or highest number in a list...
or how to find the lowest or minimum number in a list.
exList = [5,2,1,6,7] largest = max(exList) print(largest) smallest = min(exList) print(smallest)
Rounding will round to the nearest whole. There are also ways to round up or round down.
x = 5.622 x = round(x) print(x) y = 5.256 y = round(y) print(y)
Converting data types:
Many times, like reading data in from a file, you might find the datatype is incorrect, like when we mean to have integers, but they are currently in string form, or visa versa.
Converting a string to an integer:
intMe = '55' intMe = int(intMe) print(intMe)
Converting and integer to a string:
stringMe = 55 stringMe = str(stringMe) print(stringMe)
Converting an integer to a float:
floatMe = 55 floatMe = float(floatMe) print(floatMe)
You can also convert floats to strings, strings to floats, and more. Just make sure you do a valid operation. You still cannot convert the letter h to a float.