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iOS Swift Basics (retired) Control Flow For-In Loop

Posted by petri foxx
petri foxx
336 Points

for in

can't understand Use a for-in loop to print out a "7 times table". Your output should look like this: 1 * 7 = 7 2 * 7 = 14 Etc., all the way up to 10. Each line should be on a new line.

1 Answer

Vittorio Somaschini
Vittorio Somaschini
33,371 Points
Vittorio Somaschini
Vittorio Somaschini
33,371 Points

Hello Petri.

The code challenge is asking you to print a list of operation with a particular format: 1 * 7 = 7, 2*7 = 14 and so on..

So, we will need a for in loop here that takes all the values from 1 to 10 (in swift 1...10), loop through each value and returns the string in the proper format:

for i in 1...10 {
  println("\(i) * 7 = \(i*7)")
}

First line means: for every "i" in 1 to 10 , do something...

second line is what we want to println, so each i * 7 = the result of i * 7

We use the (i) to make the compiler know it has to use what it got with the for in loop.

Hope I could explain it decently.

Let me know

Vittorio