(*) --> "if .."
"if .." -->[score > 90] "grade = A"
--> (*)
"if .." -->[score > 80] "grade = B"
--> (*)
"if .." -->[score > 60] "grade = C"
--> (*)
"if .." -->[score > 50] "grade = D"
--> (*)
"if .." -->[score > 40] "grade = E"
-->(*)
"if .." -->[else] "grade = F"
--> (*) |