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iOS Swift 2.0 Functions Function Parameters Function Scope

function Scope when i input the code that Pasan is doing it raise an error

func countDownAndUp(var a: Int) { var b = a

while b >= 0 { b--
a++ print("a: (a)") print("b: (b)")

} } var a = 20 countDownAndUp(10)

it raise me an error when i add var to the parameter because it says that it can not be add and also on a++ it tells me that i have to write it a += 1 and b-- it says b -= 1 i don't know i am confuse!

Thank you in advance

3 Answers

Jennifer Nordell
Jennifer Nordell
Treehouse Teacher

It's not your fault! Swift deprecated the use of ++ and --. Switch the ++ to += 1 and the -- to -= 1. This should fix your errors. Hope this helps! :sparkles:

Thank you

swift 3 is a bit deferent ++ = ( += 1) and -- = ( -= 1)