VB.net 2010 视频教程 VB.net 2010 视频教程 python基础视频教程
SQL Server 2008 视频教程 c#入门经典教程 Visual Basic从门到精通视频教程
当前位置:
首页 > Python基础教程 >

  • Python基础语法精华(3)

Out[49]:
True
In [50]:
1 <= 4
Out[50]:
True
In [51]:
1 == 1
Out[51]:
True
In [52]:
'hi' == 'bye'
Out[52]:
False
 

Logic Operators

In [53]:
(1 > 2) and (2 < 3)
Out[53]:
False
In [54]:
(1 > 2) or (2 < 3)
Out[54]:
True
In [55]:
(1 == 2) or (2 == 3) or (4 == 4)
Out[55]:
True
 

if,elif, else Statements

In [56]:
if 1 < 2:
    print('Yep!')
 
Yep!
In [57]:
if 1 < 2:
    print('yep!')
 
yep!
In [3]:
if 1 < 2:
    print('first1')
else:
    print('last')
 
first1
In [59]:
if 1 > 2:
    print('first')
else:
    print('last')
 
last
In [60]:
if 1 == 2:
    print('first')
elif 3 == 3:
    print('middle')
else:
    print('Last')
 
middle
 

for Loops

In [61]:
seq = [1,2,3,4,5]
In [62]:
for item in seq:
    print(item)
 
1
2
3
4
5
In [63]:
for item in seq:
    print('Yep')
 
Yep
Yep
Yep
Yep
Yep
In [64]:
for jelly in seq:
    print(jelly+jelly)
 
2
4
6
8
10
 

while Loops

In [65]:
i = 1
while i < 5:
    print('i is: {}'.format(i))
    i = i+1
 
i is: 1
i is: 2
i is: 3
i is: 4
 

range()

In [66]:
range(5)
Out[66]:
range(0, 5)
In [67]:
for i in range(5):
    print(i)
 
0
1
2
3
4
In [68]:
list(range(5))
Out[68]:
[0, 1, 2, 3, 4]
 

list comprehension

In [69]:
x = [1,