python基础—while循环
while循环语法:
while 条件():
条件满足时,做的事情1
条件满足时,做的事情2
while死循环:
while True:
print('hello world')
练习1:
分别求1~100之间的所有奇数和与偶数和
代码框架如下:
#1.定义一个整数记录循环的次数
# i = 0
#2.定义最终结果的变量
# result = 0
#3.开始循环
# while i <= 100:
# print(i)
#4.每次循环都让result和i这个计数器想加
# result += i
#5.处理计数器
# i += 1
# print('0~100之间的数字奇数和结果为 %d' %result)
完整代码如下:
"""
# _*_coding:utf-8_*_
Name:jishuhe.py
Date:1/14/19
Author:westos-sql
Connect:[email protected]
Desc:...
"""
i = 0
result = 0
while i <= 100:
result += i
res = 5050 - result
i += 2
print('oshuhe is: %d' %result)
print('jishuhe is: %d' %res )
执行结果:
练习2:打印9*9乘法表
代码如下:
"""
# _*_coding:utf-8_*_
Name:multi.py
Date:1/14/19
Author:westos-sql
Connect:[email protected]
Desc:...
"""
i = 1
while i <= 9:
j = 1
while j <= i:
print('%d * %d = %2d ' %(i,j,i*j),end='')
j += 1
i += 1
print('')
打印结果: