python学习笔记(02)：控制流

if guess==number:
print 'yes'
elif guess>number:
print 'big'
else:
print 'small'
#python没有switch语句

while running:
print 'It is running'
else:
print 'The while loop is over!'
#python中可在while循环里使用一个else从句

for i in range(1,5,2)
print i
else:
print 'The for loop is over'
#如果包含else，则总在for循环结束后执行一次，除非遇到break
#range第三个数将成为步长，缺省为1