What's 'task' doing in this example?

Question

for task in todo { print(task) }

Can anyone explain what task or whatever you take does? I don't exactly get its use. And what do you call it? Is it a variable?

Answer 1 · 2015-11-01T19:51:06Z

November 1, 2015 7:51pm

task is a variable. It's only available within the scope of the the for loop (meaning, that task won't exist outside of for ... { }.

for task in todo {
  print(task)
}

Your code says: Loop through todo array (start with the first item), and assign its value to task, then print task.

Although, you'll probably won't write code like this, the above for loop is effectively doing this:

var index = 0
while index < todo.count {
    let task = todo[index]
    print(task)
    index++
}

Answer 2 · 2016-06-07T01:20:38Z

June 7, 2016 1:20am

you can put anything you want instead of task just remember to update it in you print()

Answer 3 · 2015-11-12T17:41:12Z

November 12, 2015 5:41pm

Lukas, in the end, it doesn't really matter how you call this thing. In its essence this is just a running index number of how many iterations you want to be executed by the for-loop. The syntax basically is:

for blaaaa in todo {
      print(todo[blaaaa])
}

People like to give this blaaaa a name, but in fact it doesnt matter. The only thing it does, is to be used as a placeholder in the todo-subscript (whats in square brackets [] after the arrayname) to advise the loop that it shall output the index number of the array.

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Lukas Muller

Lukas Muller

What's 'task' doing in this example?

3 Answers

Johanns Gregorian

Johanns Gregorian

Lukas Muller

Lukas Muller

Trent Christofferson

Trent Christofferson

Kim Sorgalla

Kim Sorgalla

James Estrada

James Estrada