python中if elif条件语句实用范例

python中if elif条件语句实用范例

marks = 99
if marks >= 90:
   grade = 'A'
elif marks >= 80:
   grade = 'B'
elif marks >= 70:
   grade = 'C'
elif marks >= 60:
   grade = 'D'
else:
   grade = 'F'
print(grade)