5.流程控制-if条件判断

1.流程判断,if else

score =int(raw_input("please a num: ")) # raw_input 是接受字符串，所以要强制转为数值的整形
if score >=90:
    print"A,very good"
elif score >=80:
    print"B,good"
elif score >=70:
    print"C,pass"
else:
    print"End"