Swift Loops
Repeat code efficiently with Swift loop structures
🔄 What are Swift Loops?
Swift loops allow you to execute code repeatedly until a condition is met. They help automate repetitive tasks and iterate through collections efficiently, making your code cleaner and more maintainable.
// Simple loop example
for i in 1...3 {
print("Count: \(i)")
}
Output:
Count: 1
Count: 2
Count: 3
Types of Swift Loops
For-In Loop
Iterate through sequences
for item in array {
print(item)
}While Loop
Loop while condition is true
while condition {
// code here
}Repeat-While
Execute at least once
repeat {
// code here
} while conditionLoop Control
Break and continue statements
for i in 1...10 {
if i == 5 { break }
print(i)
}🔹 For-In Loop Basics
The most common loop for iterating through collections:
let fruits = ["apple", "banana", "orange"]
for fruit in fruits {
print("I like \(fruit)s! 🍎")
}
// Loop through a range
for number in 1...5 {
print("Number: \(number)")
}Output:
I like apples! 🍎
I like bananas! 🍎
I like oranges! 🍎
Number: 1
Number: 2
Number: 3
Number: 4
Number: 5
🔹 While Loop Example
Execute code while a condition remains true:
var countdown = 5
while countdown > 0 {
print("Countdown: \(countdown)")
countdown -= 1
}
print("Blast off! 🚀")Output:
Countdown: 5
Countdown: 4
Countdown: 3
Countdown: 2
Countdown: 1
Blast off! 🚀
🔹 Loop Control Statements
Control loop execution with break and continue:
// Using continue to skip even numbers
for i in 1...10 {
if i % 2 == 0 {
continue // Skip even numbers
}
print("Odd number: \(i)")
}
// Using break to exit early
for i in 1...10 {
if i == 6 {
break // Stop at 6
}
print("Number: \(i)")
}Output:
Odd number: 1
Odd number: 3
Odd number: 5
Odd number: 7
Odd number: 9
Number: 1
Number: 2
Number: 3
Number: 4
Number: 5