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iOS

Posted by erik Jones Oniga
erik Jones Oniga
3,307 Points

Subject(Swift) Can somebody please tell me how to append a for (name ) in to an array

Swift Loop (Range operator)

jcorum
jcorum
71,830 Points

erik, can you give us a link to the challenge, or a copy of the code? Are you talking about doing the append inside a for loop?

erik Jones Oniga
erik Jones Oniga
3,307 Points

can you tell me the syntax of that?

erik Jones Oniga
erik Jones Oniga
3,307 Points

yeah that's what i mean

jcorum
jcorum
71,830 Points

erik, sorry, but I don't know what you are referring to? syntax of what?

erik Jones Oniga
erik Jones Oniga
3,307 Points

here is the link: https://teamtreehouse.com/library/swift-20-collections-and-control-flow/control-flow-with-loops/for-in-loops

4 Answers

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

erik, I see I guessed wrong.

// Enter your code below
var results: [Int] = []

let multiplier = 6 //create constant

for i in 1...10 { //loop from 1 to 10 using a range
  results.append(i * multiplier)  //append the product of each number in the range and multiplier
}
jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

Well, I'm guessing here, but this may be what you are interested in:

var nums = [Int]()
for n in 1...10 {
   nums.append(n)
}
nums  // [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

First we create an array of Ints named nums. Then we loop through the range 1...10, and each time we append the value to the array.

erik Jones Oniga
erik Jones Oniga
3,307 Points
erik Jones Oniga
erik Jones Oniga
3,307 Points

thank you very much

erik Jones Oniga
erik Jones Oniga
3,307 Points

but i did the same thing without the constant let multiplier = 6 and i did (for i in 1...10{ results.append(multiplier * 6)}

and it was right, is that ok?

jcorum
jcorum
71,830 Points
jcorum
jcorum
71,830 Points

erik, the editor can be really picky sometimes, and sometimes not. You are correct. I didn't read the directions carefully enough. They do say "For in loops also define a constant that temporarily stores the value in the iteration process. For the loop you're writing, name this constant multiplier." Interesting that the editor didn't complain.

I don't like hard-coding numbers in functions, loops, etc. So I created the separate constant by habit!