var mark:int 
put "Enter a mark ".. 
get mark 
if mark >=80 then 
put "a ",mark, " is a level 4" 
elsif mark >=70 then 
put "a ",mark, " is a level 3"
elsif mark >=60 then 
put "a ",mark, " is a level 2"
elsif mark >=50 then 
put "a ",mark, " is a level 1"
else put mark, " is a failure" 
end if