Control Flow

Conditional Statements

If-Else Statement

The if-else statement allows you to execute different code blocks based on a condition.

if age >= 18 {
    print("You are eligible to vote.")
} else {
    print("You are not eligible to vote.")
}

Switch Statement

The switch statement is used for multiple conditions and is more readable than nested if-else statements.

switch grade {
case "A":
    print("Excellent!")
case "B":
    print("Good!")
default:
    print("Keep trying!")
}

Loops

For Loop

The for loop is used for iterating over a sequence, like an array or a range.

for i in 1...5 {
    print("Iteration \(i)")
}

While Loop

The while loop continues as long as a condition is true.

while count < 5 {
    print("Count is \(count)")
    count += 1
}

Repeat-While Loop

The repeat-while loop is similar to the while loop but checks the condition after the loop is executed.

repeat {
    print("This will run at least once.")
} while false

Conclusion

Understanding control flow in Swift is crucial for creating dynamic and interactive programs. The if-else and switch statements allow you to make decisions in your code, while loops like for, while, and repeat-while let you execute code repeatedly.