第四部分python循环语句

发布网友发布时间：2022-12-11 15:09

共1个回答

热心网友时间：2024-12-13 05:29

#while循环

n=100

sum=0

counter=1

while counter<=n:

sum=sum+counter

counter+=1

print('1到%d之和为:%d'%(n,sum))

print('1到%d之和为:'%n,sum)

#无限循环

var=1

while var==1:

num=int(input('输入数字:'))

print('你输入的是:',num)

print('bye')

count=0

while count<5:

print(count,'小于5')

count=count+1

else:

print(count,'大于等于5')

#for语句

languages=['a','b','c','d']

for x in languages:

print(x)

#break跳出当前循环

sites=['google','','runoob','taobao']

for site in sites:

if site=='runoob':

print('菜鸟教程！')

break

print('循环教程',site)

else:

print('没有循环数据')

print('完成循环')

#range()遍历数字序列

for i in range(5,9):

print(i,end=",")

else:

print('didi')

for j in range(0,10,3):

print(j,end=',')

else:

print('lili')

sites=['google','','runoob','taobao']

for i in range(len(sites)):

print(i,sites[i])

list(range(5))

#break和continue语句及循环中的else子句

#第一实例:for-break

for letter in 'runoob':

if letter=='b':

print('找到了%s！'%letter)

break

print('字母为:',letter)

print('完成！')

#第二实例:while-break

var=10

while var>0:

print('当前数值为：',var)

var-=1

if var==3:

print('找到了：',var)

break

print('bye!')

#第三实例:while-continue

for letter in 'runoob':

if letter=='o': #字母为o跳过输出

continue

print('字母为:',letter)

print('完成！')

for n in range(2,10):

for x in range(2,n):

if n%x==0:

print(n,'等于',x,'*',n//x)

break

else:

print(n,'是质数')

#pass语句不做任何事情，用作占位语句

for letter in 'runoob':

if letter=='o':

pass

print('pass语块')

print('字母为:',letter)

#乘法口诀

for i in range(1,10):

for j in range(1,i+1):

print(str(i)+'*'+str(j)+'='+str(i*j)+' ',end='')

print('')

for i in range(9,0,-1):

for j in range(1,i+1):

print(str(i)+'*'+str(j)+'='+str(i*j)+' ',end='')

print('')