What output will we get in this example №3

This code snippet demonstrates how a closure captures a struct object and attempts to modify its property. You need to understand what value will be printed after executing the closure.

struct IntegerBox {
    var value: Int

    init(_ value: Int) {
        self.value = value
    }
}

var firstInt = IntegerBox(10)

let closure = { [firstInt] in
    firstInt.value = 77
}

closure()

print(firstInt.value)