CODEWITHSUNDEEP
arraysswiftmath
New.Nikki
New.Nikki

Reputation: 1

Performing math function in array for Swift

I'm new to programming, and having a difficult time taking the array below and performing a mathematical expression on each index then printing the result.

var projectOne = [ 1, 3, 5, 0, 6]
for addition in projectOne {
    print( projectOne "plus 4 is" \projectOne = projectOne + 4)
}

Upvotes: 0

Views: 526

Answers (2)

user887210
user887210

Reputation:

One way to do this is to use map and a closure to transform the array:

var projectOne = [ 1, 3, 5, 0, 6]
projectOne = projectOne.map() {
  let newValue = $0 + 4
  print("\($0) plus 4 is \(newValue)")
  return newValue
}

You can also use a for..in loop like this:

var projectOne = [ 1, 3, 5, 0, 6]

for (index, value) in projectOne.enumerate() {
  projectOne[index] += 4
  print("\(value) plus 4 is \(projectOne[index])")
}

Upvotes: 0

Leo Dabus
Leo Dabus

Reputation: 236478

You should be using the addition (array element) inside your loop. You should also take a look at Apple docs String interpolation.

print("\(addition) plus 4 is \(addition + 4)")

If you would like to increment all elements in your array you can enumerate it and add 4 to each element as follow:

for (index,element) in projectOne.enumerate() {
    projectOne[index] += 4

    print("\(element) plus 4 is \(element + 4)")
}

print(projectOne)  // "[5, 7, 9, 4, 10]\n"

Upvotes: 1

Related Questions