To say if2 (c1 - condition) and-or (c2 - condition) -- beginning if2:
    (- switch (({c1})*2 + ({c2})) { 3: -).
To say else1 -- continuing if2: (- 2: -).
To say else2 -- continuing if2: (- 1: -).
To say else0 -- continuing if2: (- 0: -).
To say end if2 -- ending if2: (- } -).