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iOS Swift Collections and Control Flow Control Flow With Loops Working With Loops

Maria Angelica Dadalt
Maria Angelica Dadalt
6,197 Points

How do I get the loop to sum de numbers in the array?

let numbers = [2,8,1,16,4,3,9] var sum = 0 var counter = 0

while counter < { counter+=1 }

loops.swift
let numbers = [2,8,1,16,4,3,9]
var sum = 0
var counter = 0

while counter < 7 {
  counter+=1
}

2 Answers

Kyle Johnson
Kyle Johnson
33,528 Points

Hi Maria!

First, I would like to suggest google searching to try an find a solution to these treehouse challenges and any times you may get stuck writing your own code. In this case, I searched "swift array" and the first link was to the apple swift documentation. Getting familiar with the documentation is a must!

It looks like we are trying to get each value from the array. To do this we call the array, followed by brackets with the index of the value we want to get. We will use the variable counter because this will cycle through the index values with help of the while loop.

numbers[counter]

Next we want to add all those values.

sum = sum + numbers[counter]

This line of code will go here:

while counter < 7 {
  sum = sum + numbers[counter]
  counter+=1
}
Maria Angelica Dadalt
Maria Angelica Dadalt
6,197 Points

Thanks, Kyle!! I'll be sure to check google before asking again.

Kyle Johnson
Kyle Johnson
33,528 Points

You're welcome! The treehouse community is a great resource too.