To change all elements of an array in Swift, you can use a loop or higher-order functions like map or forEach. Here are some examples:
1. Using a loop:
var numbers = [1, 2, 3, 4, 5]
for i in 0..2. Using map:
var numbers = [1, 2, 3, 4, 5]
numbers = numbers.map { $0 * 2 }
print(numbers) // Output: [2, 4, 6, 8, 10]
3. Using forEach:
var numbers = [1, 2, 3, 4, 5]
numbers.forEach { $0 *= 2 }
print(numbers) // Output: [2, 4, 6, 8, 10]
All these methods achieve the same result - they iterate over each element of the array and perform a modification operation on it. The loop method is a more traditional approach, while map and forEach are considered more functional programming methods.