I have only just started to learn python as my first language and whilst i worked out the code for fizzbuzz, i cannot for the life of me get it to do the items below. I also want it to print horizontally instead of vertically. Any help would be great (heads spinning). Create a function which does this. For example
fizzbuzz(20)
would print
1,2,fizz,4,buzz,fizz,7,8,fizz,buzz,11,fizz,13,14,fizzbuzz,16,17,fizz,19,buzz
def fizzbuzz(n):
for x in range (101):
if x%3==0 and x%5==0:
print("fizz buzz")
elif x%3==0:
print('fizz')
elif x%5==0:
print('buzz')
else:
print (x)
def main():
print(fizzbuzz(20))
12 Answers
Shorter yet:
for n in range(100):
print("Fizz"*(not n % 3) + "Buzz"*(not n % 5) or n)
Yes, but why?
To understand this, let's look at the parts separately.
"Fizz"*(not n % 3)
In Python, we can "multiply" strings, so "a"*3 would result in "aaa". You can also multiply a string with a boolean: "a" * True is "a", whereas "a" * False is an empty string, "". That's what's happening to our "Fizz" here. When n % 3 == 0 (ie. n is 3, 6, 9, ...), then not n % 3 will be the same as not 0, which is True. Conversely, when n is 1, 2, 4, 5, 7, ... then n % 3 will be either 1 or 2, and not n % 3 will be false. In Other words, whenever n is divisible by 3, the term "Fizz"*(not n % 3) will multiply the string "Fizz" by True, and when it's not, it will multiply by False, resulting in an empty string.
The same logic applies to the next part, "Buzz"*(not n % 5). It'll give us an empty string when n is not divisible by 5, and the string "Buzz" when it is.
Now we're adding those two things together:
"Fizz"*(not n % 3) + "Buzz"*(not n % 5)
When n is neither divisible by 3 nor 5, this will be adding two empty strings together (ie. "" + ""), which will of course give us another empty string. In that case, the whole print statement reads print("" or n). Since an empty string is False-y, it will print our number n. If n is divisible by 3 (but not 5), this would be print("Fizz" or n), and since "Fizz" is Truthy, it will just print that and omit the number.
