collatz conjecture, the fabulous unsolved problems in math.

collatz.py

## https://www.mathcelebrity.com/collatz.php?num=+109&pl=Show+Collatz+Conjecture
## https://goodcalculators.com/collatz-conjecture-calculator/ 
## sharpicx

def collatz(num):
    i = [num]
    while num != 1:
        if num % 2 == 1:
            num = 3 * num + 1
        else: 
            num //= 2
        if num <= 256: # basic ascii chars sampai ke extended codes dengan total 256 karakter.
            i.append(num)
    return i

def main():
    num = int(input('masukkan angka> '))
    print(collatz(num)) ## bilangan prima

main()