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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
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sorry, I'm blurred, why $res has to be start at 1, and why you can convert this [1! + 2! .... n!] to only 1...
Is it a math theory or....?
It's alright now, I finally solved it. Thanks
This comment is hidden because it contains spoiler information about the solution
I passed the first two cases but failed in the last case. It said
"
Failed asserting that two strings are equal.
Expected: 'E'
Actual : 'E '
"
But when I try it with hardcode, it came out with the expected answer, but I'm keep getting wrong when attempt...
Help...