Keep practicing, you can do it.

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I wanted to do this but couldn't perform a double regex by && || but couldn't think of this, brilliant.

don't know what he means though, is he mocking PHD ?

It's reversing because the i is being pushed each time in the new string which is making it reversed
let's say input is "hello world"
when we're running this code we're putting in h first time thn e thn l thn l thn o and so on
so h is being pushed to right which is making it go reverse
h first thn e being - eh thn l so leh like this
I'm a newbie too btw hope this helps

total isn't an array here, .push() is only for arrays. total is a number which is zero, other positive numbers will add to total and later returning the sum

it does but each time it compares if the length is smaller than i
if it is smaller than it keep on going if it isn't it stops

that's the dream we're all dreaming cheers mate

I know it's been 3 years but
only after 21 days you were saying this !? give it some time coding isn't as easy as it seems by now you can do harder problems too I believe

I'm a bit confused about !! there, can someone explain that one

I think he doesn't know himself lol

It might be simpler for you bro, but for people like me who's new in here found it pretty hard.
I completed it but I feel like there's a better way to do it.
Got many repetition in my code