python条件(if语句)内容的梳理

python的简单的if...else....语句:

if  a==a:
print("条件成立")
else:
print("条件不成立")

python的多重条件语句elif:

 

num=raw_input(">>>")  #等待用户输入数字
if  num>1 and num<10:
print(num)
elif num>10 and num<50:
print(num)
elif num >50 and  num<100:
print(num)
else:
print(num)