For with a step in Swift

In Swift, for is a loop statement that allows you to execute a block of code repeatedly. The for loop works by specifying a range or a collection of elements to iterate over:

1. Using a Range with for loop:

for i in 0..<5 {
  print(i) // Prints 0 to 4
}

In this example, we iterate over a range of 0..<5. The range specifies values from 0 up to, but not including, 5. The loop executes 5 times and prints each value of i.

2. Using a Collection with for loop:

let numbers = [1, 2, 3, 4, 5]
for number in numbers {
  print(number) // Prints 1 to 5
}

In this example, we iterate over an array of integers named numbers. The loop executes as many times as there are elements in the array, each time assigning the current element to the constant number.

3. Using Step with for loop:

for i in stride(from: 0, to: 12, by: 2) {
  print(i) // Prints 0, 2, 4, 6, 8, 10
}

In this example, we use stride(from:to:by:) to iterate over a range of even numbers from 0 up to, but not including, 12. The loop executes 6 times and prints each even number from 0 to 10.

You can use a similar stride(from:through:by:) method to include the upper bound value in the loop.

For with a step in Swift

See this concept in other languages