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Programming humor on reddit used to be excellent bits like this but then it devolved into new learners jumping straight to the irony they didn't understand and flooded the sub with nonsense.
I miss these bits.
btw it does get easier
import math
def is_even(num):
if num in [i for i in range(1000) if float(i)/2.0 == math.floor(float(i)/2.0)]:
print("true")
else:
print("false")
Obviously one would need to increase the range for bigger numbers but this code is optimized.
def is_even(n):
match n:
case 1:
return False
case 0:
return True
# fix No1
case n < 0:
return is_even(-1*n)
case _:
return is_even(n-2)
Python added match/case?! Bunch of mypy issues have been closed too. Maybe its time to dust off some old projects.
It was added in 3.10 and is surprisingly complete. The tutorial pep is a good starting point to see what it can accomplish
My solution in perl back in the day when I was a teenage hobbyist who didn't know about the modulus operator: Divide by 2 and use regex to check for a decimal point.
if ($num / 2 =~ /\./) { return "odd" }
else { return "even" }
Divide by 2 and check for a decimal point.
I mean, it ain't wrong.
You know, I was going to let this slide under the notion that we're just ignoring the limited precision of floating point numbers... But then I thought about it and it's probably not right even if you were computing with real numbers! The decimal representation of real numbers isn't unique, so this could tell me that "2 = 1.9999..." is odd. Maybe your string coercion is guaranteed to return the finite decimal representation, but I think that would be undecidable.
Ackchyually-- IEEE 754 guarantees any integer with absolute value less than 2^24 to be exactly representable as a single precision float. So, the "divide by 2, check for decimals" should be safe as long as the origin of the number being checked is somewhat reasonable.
Of course, but it's somewhat nasty when all of a sudden is_even doesn't do what you expect :).
You could do this in one line...
By removing all the linebreaks.
i think it should one giant ternary expression composition
Of course there's an easier way. Just integrate the state of the art API dedicated for this exact problem. https://isevenapi.xyz/
This is confusing. I'm already using the iSeven API to determine if a number is 7. I'm getting a namespace collision error when I try to load this new API. Bug report filed.
Modulo
I'm more of a Gemini myself
print(theJoke % you);
wooosh
modulo
pseudocode:
if number % 2 == 0
return "number is even" (is_num_even = 1 or true)
else
return "number is odd" (is_num_even = 0 or false)
plus you'd want an input validation beforehand
#You are an input. You have value! You matter!
if number % 2 == 0
return "number is even" (is_num_even = 1 or true)
else
return "number is odd" (is_num_even = 0 or false)
Am I doing it right? /S.
Don't put nbsps in code blocks, they show up literally.
who needs modulo when you can get less characters out of
while (number > 1) {
number -= 2;
}
return number;
very efficient
edit: or theres the trusty iseven api
here is somewhat less:
return (number % 2) == 0;
return !(number & 1);