Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

iOS Swift Collections and Control Flow Control Flow With Loops Looping Over Ranges

Janice Lau
Janice Lau
748 Points
Posted by Janice Lau
Janice Lau
748 Points

interpolation

I do not understand why we use interpolation in rangers.

for number in 1...10 { print ("(number)times 5 is equal to (number*5)") }

1 Answer

Brandon Mahoney
.a{fill-rule:evenodd;}techdegree seal-36
Brandon Mahoney
iOS Development with Swift Techdegree Graduate 30,149 Points

It makes it a whole lot cleaner than concatenation when you need to put an Int into a String. 

for number in 1...10 {
    print ("\(number) times 5 is equal to \(number*5)")
}

for number in 1...10 {
    let num = String(number)
    let total = String(number * 5)
    let string = " times 5 is equal to "
    print (num + string + total)
}
Janice Lau
Janice Lau
748 Points
Janice Lau
Janice Lau
748 Points

Got it. Thank you much.