var mark: int

put "what was your mark in %?"
get mark

if mark <=50 then
put "you failed"
elsif mark >=50 and mark <=59 then
put "you got a D"
 
elsif mark >=60 and mark <=69 then
put "you got a C"

elsif mark >=70 and mark <=89 then
put "you got a B"

elsif mark >=90 and mark <=100 then
put "you got a A"

end if