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iOS Swift Basics (retired) Control Flow While and Do-While Loop

Posted by Harry Stebbings
Harry Stebbings
1,097 Points

Hey guys, really struggling here. Any ideas where I am going wrong?

var index = 0 while index < numbers { println(numbers[Index]) index++

Is there anything wrong with this?

while_loops.swift 
let numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
var index = 0
while index < numbers {
             println(numbers[Index])
             index++

}

1 Answer

Gareth Borcherds
Gareth Borcherds
9,372 Points
Gareth Borcherds
Gareth Borcherds
9,372 Points

numbers is a NSArray so when you try and compare it to index < numbers you aren't saying less than a number. You need to get the count of the array. Try this.

let numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
var index = 0
while index < numbers.count {
    println(numbers[index])
    index++

}
Harry Stebbings
Harry Stebbings
1,097 Points

it is still not working! I did try that previously but gave it another go when you recommended it!

Gareth Borcherds
Gareth Borcherds
9,372 Points
Gareth Borcherds
Gareth Borcherds
9,372 Points

What error are you receiving? Also, you had an incorrect spelling of index where you had a capital I for Index in your print statement. I fixed that in my code above. I tried this in a playground and it's working.