var list = [1,2,3,4]

list[0] += 10
System.print(list[0]) // expect: 11

list[1] -= 3
System.print(list[1]) // expect: -1

list[2] *= 9
System.print(list[2]) // expect: 27

list[3] /= 2
System.print(list[3]) // expect: 2

list[0] <<= 2
System.print(list[0]) // expect: 44

list[2] >>= 1
System.print(list[2]) // expect: 13