var a = 0
System.print(a) // expect: 0
a += 5
System.print(a) // expect: 5
a -= 1
System.print(a) // expect: 4
a *= 4
System.print(a) // expect: 16
a /= 2
System.print(a) // expect: 8
a <<= 8
System.print(a) // expect: 2048
a >>= 6
System.print(a) // expect: 32
a %= 3
System.print(a) // expect: 2
a ^= 4
System.print(a) // expect: 6
a |= 8
System.print(a) // expect: 14
a &= 6
System.print(a) // expect: 6