如何访问向量中的最后一个值？

last_value = my_list[-1]

int lastValue = myArray[myArray.length - 1];

const lastValue = myArray[myArray.length - 1];

int lastValue = myArray[myArray.size() - 1];

int lastValue = myArray[myArray.Length - 1];

$lastValue = $myArray[count($myArray) - 1];

last_value = my_array.last

lastValue := myArray[len(myArray) - 1]

let lastValue = myArray[myArray.count - 1]

val lastValue = myArray[myArray.size - 1]