You've already got that. To cover my bases... The existential operator can be used infix: result = a ? 0 Or postfix (does "result" exist?) result? Or to

You've already got that. To cover my bases... The existential operator can be used infix: result = a ? 0 Or postfix (does "result" exist?) result? Or to conditionally assign, as we've seen above: result ?= a