Selgitage, mida tähendab muutujate haaramine sulgfunktsiooni sees.

Variable capturing inside a closure function means that the closure "remembers" and can use variables from the surrounding context in which it was created.

For example, if a variable is declared inside a function and then a function that uses this variable is returned, this variable is "captured" by the closure and retains its value even after exiting the outer function.

Example in Swift:

func makeIncrementer(amount: Int) -> () -> Int {
    var total = 0
    return {
        total += amount
        return total
    }
}

let incrementByTen = makeIncrementer(amount: 10)
print(incrementByTen()) // 10
print(incrementByTen()) // 20

Here, the closure captures the variables total and amount, maintaining their state between calls. This allows creating functions with internal state.