beejjorgensen / bgpython

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bgpython's Issues

Minor errors in chapter's 4 and 5

Hello, I'm pairing your wonderful book with an intro to programming course I'm taking https://cs50.harvard.edu/python/2022/ and wanted to post some of the mistakes (or at least I think they are) I've come across so far. Also, the issues I've come across here are incredibly minor, but I do hope they help nonetheless.

I'm specifically working through this version of the book: https://beej.us/guide/bgpython/html/split/

Chapter 4

4.3 Launching your IDE and Opening a File

In the quoted section that explains what a file and file extensions are you have a line towards the bottom:

As an example, here’s a complete file name and extension:
{.default} hello.py

I could be wrong, but I don't think {.default} is intended here.

Chapter 5

5.7 Converting Between Data Types

In the paragraph that follows for your explanation of the code below you mention storing a return value in y but, the example code doesn't contain a y variable. I think you meant to say b here.

a = "3490"    # a is a string "3490"
b = int(a)    # b is an integer 3490!

print(b + 5)  # 3495

How did that work? We called the built-in int() function and passed it a string "3490". int() did all the hard work and converted that string to an integer and returned it. We then stored the returned value in y. And finally, we printed the value of b+5 just to show that we could do math on it.

5.10 Exercises

Exercise 5.3

In the provided solution for exercise 3 (https://beej.us/guide/bgpython/source/examples/ex_threesumdiff.py), the print statements say "two" instead of "three" when computing the sum/difference of 3 numbers.

# print the sum of x + y + z
print("The sum of the two numbers is:", x + y + z)

# print the difference of x - y - z
print("The difference of the two numbers is:", x - y - z)

Incorrect comment

Incorrect comment in Flow Control:

for i in range(4, 20, 2): # loop from 5 to 9, skipping by 2 each time
    print(i)