If, else in expression or use jython?

[witman]

The closest expression equivalent of elif is nested if statements. It's not quite as elegant and must include a final else (unlike Python scripts):

// Start with an if.
if(condition, 1,
	// Nest if to get equivalent of elif.
	if(condition, 2,
		// With expressions you always have an else value at the end.
		0
	)
)

In most cases, binEnum would be an elegant replacement for the above nested ifs. See examples in the other thread you posted in.

The switch expression isn't a viable replacement for elif unless you're using elif to evaluate different values of a single condition.

If Statement

Use switch or case to get different results for different values of a single tag/property. Use binEnum (to get index of first true condition) or binEnc (to get a single value representing state of all conditions) for multiple true/false conditions.