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jblackston

Lost Pencils!

Algorithms
Logic

If you're like me, you lose a crap ton of pencils.

Most of the time, I lose them one at a time- but how many pencils have I lost in my pencil-losing career total?

Write a function that takes in pencils I had yesterday, 'end', and then returns how many I have lost cumulatively.

I will never keep more than 20 pencils on me, because that's just insane. So the variable end will only be measured in integers less than 20.

Examples:

lostPencils(6)

21

lostPencils(8)

36

def lostPencils(end):
    result = 0
    current = 1

    while current <= end:
        result += current
        current += 1
    
    return result