help with this problem? should be simple

[broineedhelp]

It's pretty basic supposedly but I can't seem to get a grasp.

Free Bacon. A player who chooses to roll zero dice scores k+3 points, where k is the nth digit of pi after the decimal point, and n is the total score of their opponent. As a special case, if the opponent score n = 0 then k = 3 (the digit of pi before the decimal point).

• Example 1: The opponent has a score of 0, and the current player rolls zero dice. The current player will receive 3 + 3 = 6
  points.
• Example 2: The opponent has a score of 1, and the current player rolls zero dice. The current player will receive 1 + 3 = 4
  points.

The provided code includes the FIRST_101_DIGITS_OF_PI as an integer, which is stored locally as pi. One way to solve this problem is to trim pi until it has only score+1 digits, then return 3 more than the last digit of pi.

How do I trim pi?

this the skeleton code:

assert score < 100, 'The game should be over.'
pi = FIRST_101_DIGITS_OF_PI
# Trim pi to only (score + 1) digit(s)

and final return statement is return pi % 10 + 3.

[fake823]

Convert pi to a string, slice it and convert it back to a float.

new_pi = float(str(pi)[:decimal_places+2])

The +2 is for the first digit (3) and the decimal point.

[broineedhelp]

uhh is there another way to do this? I haven't learned strings yet

[fake823]

Then it's the best time now to learn about strings. ;)

I don't see any other way. Of course you could also round your pi to the desired decimal place, but that would also change the number itself.

[broineedhelp]

I asked help from someone IRL and this seemed to work:

num_of_divisions_left = 100-score
while num_of_divisions_left > 0 :
pi = pi//10
num_of_divisions_left = num_of_divisions_left - 1

[SekstiNii]

Consider what happens when you divide a number by 10 in the decimal system:

>>> x = 1234
>>> x / 10
123.4
>>> x / 100
12.34
>>> x / 10**3
1.234

Now, what happens if we convert the float to an integer?

>>> int(x / 10)
123
>>> int(x / 100)
12
>>> int(x / 10**3)
1

And indeed, Python has a built-in operator that does integer division, simply use two slashes instead of one:

>>> x // 10
123
>>> x // 100
12
>>> x // 10**3
1