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iOS Swift Basics (retired) Control Flow While and Do-While Loop

Posted by Anna Isabel Lamers
Anna Isabel Lamers
Courses Plus Student 331 Points

My while and do-while loops each perform the function twice as often as the number of items in my array. Why is that?

var todo : [String] = ["Learn with TreeHouse", "Prepare meals for Take Out", "Read Book", "Go to Work"]

for item in todo{println(item)}

var index = 0 while index < todo.count {println(todo[index]);index++}

I use the exact same code, just having 4 items (instead of 5 as in the example given) and my panel indicates that the function is executed 8 times.

I cannot seem to make sense of why it does not say 4 times (once per item of the array).

Can anyone help?

1 Answer

miguelcastro2
PLUS
miguelcastro2
Courses Plus Student 6,573 Points
miguelcastro2
miguelcastro2
Courses Plus Student 6,573 Points

Because you have two loops running back to back, each loop has 4 items (4+4 = 8). To illustrate this just remove the "for in" loop.