aa = true & false
a = if aa {
  1
} else {
  2
}
assert(a == 2, "right branch of and is false makes the whole expression false")

bb = false & true
b = if bb {
  1
} else {
  2
}
assert(b == 2, "left branch of and is false makes the whole expression false")

cc = true & true
c = if cc {
  1
} else {
  2
}
assert(c == 1, "both branches of and are true makes the whole expression true")

dd = false & false
d = if dd {
  1
} else {
  2
}
assert(d == 2, "both branches of and are false makes the whole expression false")