- 运算
- 算术运算
- &＃43;,-,*,/四则运算
- %取模取余
- **&＃xff0c;幂运算&＃xff0c;返回x的y次幂&＃xff1b;// &＃xff0c;取商的整数部分&＃xff0c;整除
print(2**6) # 64
print(16//6)# 2
- 比较运算
- >,<,>&＃61;,<&＃61;,!&＃61;,<>(py3中已去除)
- &＃61;&＃61; 是否相等
- 赋值运算
- &＃61;
- &＃43;&＃61;&＃xff0c;-&＃61;&＃xff0c;*&＃61;&＃xff0c;/&＃61;&＃xff0c;%&＃61;&＃xff0c;**&＃61;&＃xff0c;//&＃61;
- 逻辑运算
- 与(and)&＃xff0c;或(or)&＃xff0c;非(not)
- 成员身份运算
- in、not in 是否存在指定序列中
- is、is not 是否引用同一对象
- 位运算
- 按位与 &
- 按位或 |
- 按位异或 ^
- 按位取反 ~
- 左移 <<
- 右移 >>
#!/usr/bin/python
a &＃61; 60 # 60 &＃61; 0011 1100
b &＃61; 13 # 13 &＃61; 0000 1101
c &＃61; 0c &＃61; a & b; # 12 &＃61; 0000 1100
print "Line 1 - Value of c is ", cc &＃61; a | b; # 61 &＃61; 0011 1101
print "Line 2 - Value of c is ", cc &＃61; a ^ b; # 49 &＃61; 0011 0001 #相同为0&＃xff0c;不同为1
print "Line 3 - Value of c is ", cc &＃61; ~a; # -61 &＃61; 1100 0011
print "Line 4 - Value of c is ", cc &＃61; a <<2; # 240 &＃61; 1111 0000
print "Line 5 - Value of c is ", cc &＃61; a >> 2; # 15 &＃61; 0000 1111
print "Line 6 - Value of c is ", c
- 运算优先级
- 算术运算
- 分支结构
- 单分支与多分支
#单分支
if True:print(&＃39;条件成立了&＃39;)a &＃61; 3
b &＃61; 5
#多分支
if a>b:print(a,&＃39;>&＃39;,b)
elif a&＃61;&＃61;b:print(a,&＃39;&＃61;&＃39;,b)
else:print(a,&＃39;<&＃39;,b)print(&＃39;殊途同归&＃39;)
- 单分支与多分支
- 循环结构
- while
#死循环
while True:print(&＃39;条件成立&＃xff0c;开始循环了&＃39;)a &＃61; 3
while a<&＃61;3:print(a)a&＃43;&＃61;1
else:print(&＃39;循环结束了&＃39;) - for
for i in range(10):print("loop:", i )
- continue和break
#遇到小于5的循环次数就不走了&＃xff0c;直接跳入下一次循环
for i in range(10):if i<5:continue #不往下走了,直接进入下一次loopprint("loop:", i )#遇到大于5的循环次数就不走了&＃xff0c;直接退出
for i in range(10):if i>5:break #不往下走了,直接跳出整个loopprint("loop:", i )
- while
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