break and continue

for item in collection {
    if condition { break }      // leave the loop
    if condition { continue }   // skip to next item
}

label: for a in outer {
    for b in inner { continue label }
}

// Loop over `1...10`, binding each item to `number`
for number in 1...10 {
    // Check whether `number == 4`
    if number == 4 {
        break
    }
    // Print "Number: \(number)" to the console
    print("Number: \(number)")
}

// Loop over `1...6`, binding each item to `number`
for number in 1...6 {
    // Check whether `number % 2 == 0`
    if number % 2 == 0 {
        continue
    }
    // Print "Odd number: \(number)" to the console
    print("Odd number: \(number)")
}

outer: for i in 1...3 {
    // Loop over `1...3`, binding each item to `j`
    for j in 1...3 {
        // Check whether `j == 2`
        if j == 2 {
            continue outer
        }
        // Print "i=\(i), j=\(j)" to the console
        print("i=\(i), j=\(j)")
    }
}

while and repeat-while Loops · The where Clause · The for-in Loop · Pattern Matching

1. Using break when the intent was only to skip the current iteration; that requires continue, not break.
2. Forgetting that break inside a switch exits the switch itself, not an enclosing loop -- use a labeled break for that case.
3. Placing code after a continue in the same iteration expecting it to still run; nothing after continue executes for that pass.

• break immediately exits the nearest enclosing loop (or switch).
• continue skips the rest of the current iteration and moves to the next one.
• Labeled loops (outerLoop: for ...) let break or continue target a specific outer loop.
• Both are commonly combined with an if condition to control loop flow.