ifelse.mas

/ #L10 	Is beginning of an if control block, where an the value of an expression is determined.
/		In this case were comparing `EXP` to 0.
/ #L14	Is the body of the if statement, we output `IVALUE` and `JUMP` to `end`.
/		We `JUMP` to avoid running code from `else`.
/ #L18	Is the body of the else statement, we output `EVALUE` and continue running the program.
/		Unlike the body of the if statment we don't need to `JUMP`; instead we can continue.
/ #L11	If `EXP` is not 0 then then SKIPCOND will not skip over #L12 forcing a `JUMP`.

		ORG			0

if,		LOAD 		EXP			/ LOAD EXP into AC
		SKIPCOND	400			/ SKIPCOND 400 (if AC = 0)
		JUMP		else		/ JUMP to `else`
		LOAD		IVALUE  	/ LOAD IVALUE into AC
		OUTPUT					/ OUTPUT value IVALUE
		JUMP		end			/ JUMP to `end`

else,	LOAD		EVALUE		/ LOAD IVALUE into AC
		OUTPUT					/ OUTPUT value IVALUE

end,	HALT					/ HALT

/ variables
EXP,	DEC			1
IVALUE,	DEC			2
EVALUE,	DEC			3