Hey all, I'm going through some Swift learning materials (https://www.weheartswift.com) and learning the basics of coding in Swift. I recently came to an exercise in looping (exercise # 4.4 on https://www.weheartswift.com/loops/) in which the tutorials says:
Write all the numbers from 1 to
NNIt gives the example of:
var N = 4
output:
1
4
2
3
In the Playground in Xcode if I use the following code, it shows the println() output on two separate lines, presumably because I have two separate println()'s:
// bigNum is what I am using in place of the "N" used in the example
var bigNum = 5
var topDown = bigNum
var bottomUp = 1
for x in 1...bigNum {
if x % 2 != 0 {
println(bottomUp)
++bottomUp
} else {
println(topDown)
--topDown
}
}
However, if I use the following slightly lengthier code, I am able to put the outputs in one place, and in the correct (I think!) order:
// bigNum is what I am using in place of the "N" used in the example
var bigNum = 5
var topDown = bigNum
var bottomUp = 1
var output = 1
for x in 1...bigNum {
if x % 2 != 0 {
output = bottomUp
bottomUp = bottomUp + 1
} else {
output = topDown
topDown = topDown - 1
}
println(output)
}
My Question: In the real world (read: a real program) does it make a difference which of these I use? Will the first example print properly and with the numbers in the order that this exercise is trying to achieve? Or in order to have the numbers print out in one place in the proper order will I need to use something like the second example?
Thank you very much for humoring a Swift N00b.
🙂,
Wagulous
P.S. if you have some suggestions on making my code more elegant in general, I always appreciate the edification 🙂!
P.P.S. I'm using Xcode 6.4.
