Python 项目开发入门与进阶（第2天）

1.条件语句
缩进
tab
嵌套

if 1==1:
print('OK1')
print('OK2')
elif 2==2:
print('YES')
else:
print('Error1')
print('Error1')

2.基本数据类型
字符串 
引号
"XX" 
'XX'
"""XX""""
'''XX'''

#加法
szStr1= 'MFC'
szStr2 ='Giant'
szStr3 = szStr1 + szStr2
print(szStr3)
#乘法：重复出现十次
szStr4 =  szStr1*4
print(szStr4)

数字
=
+
-
*
/
**幂
%余数
//商
3.while循环

count = 0
while count < 10
print(count)
count = count + 1
print('OK')

4.Exercise'''
#while 循环
nCount = 0
while nCount < 10:
print(nCount)
nCount += 1
print('OK')
'''
'''
#example1
#使用while循环输入 1 2 3 4 5 6 8 9
nCount = 1
while nCount < 10:
if nCount != 7:
nInput = nCount
print(nInput)
nCount += 1
print("OK")
'''
'''
#example2
#求1-100的和
nSum = 0
nCount = 1
while nCount <= 100:
nSum += nCount
nCount += 1
print(nSum)
'''
'''
#example3
#输出1-100 所有的奇数
nCount = 1
while nCount <= 100:
if 1 == nCount % 2:
print(nCount)
nCount += 1
print('OK')
'''
'''
#example4
#输出1-100 所有的偶数
nCount = 1
while nCount <= 100:
if 0 == nCount % 2:
print(nCount)
nCount += 1
print('OK')
'''
'''
#example 5
#求1-2+3-4...+99的和
nSum = 0
nCount = 1
while nCount < 100:
if 0 == nCount % 2:
nSum -= nCount
else:
nSum += nCount
nCount += 1
print(nSum)
'''
'''
#example6
#用户登录（三次重试机会）
nCount = 0
while nCount < 3:
szName = input("Please input Name:")
szPassword = input("Please input Password:")
if ('admin' == szName) & ('admin' == szPassword):
print('Success')
nCount = 3
else:
print("fail")
nCount += 1
print('OK')
'''