# -*- coding: utf-8 -*-
#条件语句
'''
if 判断条件：
执行语句……
else：
执行语句……
'''
flag = False
name = 'python'
if name == 'python': # 判断变量否为'python'
flag = True # 条件成立时设置标志为真
print 'welcome boss' # 并输出欢迎信息
else:
print name # 条件不成立时输出变量名称
'''
if 判断条件1:
执行语句1……
elif 判断条件2:
执行语句2……
elif 判断条件3:
执行语句3……
else:
执行语句4……
'''
num = 2
if num == 3: # 判断num的值
print 'boss'
elif num == 2:
print 'user'
elif num == 1:
print 'worker'
elif num < 0: # 值小于零时输出
print 'error'
else:
print 'roadman' # 条件均不成立时输出
num = 9
if num >= 0 and num <= 10: # 判断值是否在0~10之间
print 'hello'
num = 10
if num < 0 or num > 10: # 判断值是否在小于0或大于10
print 'hello'
else:
print 'undefine'
num = 8
# 判断值是否在0~5或者10~15之间
if (num >= 0 and num <= 5) or (num >= 10 and num <= 15):
print 'hello'
else:
print 'undefine'
var = 100
if ( var == 100 ) : print "变量 var 的值为100"
print "Good bye!"
#while语句
'''
while 判断条件：
执行语句……
'''
count = 0
while (count < 9):
print 'The count is:', count
count = count + 1
print "Good bye!"
# continue 和 break 用法
i = 1
while i < 10:
i += 1
if i%2 > 0: # 非双数时跳过输出
continue
print i # 输出双数2、4、6、8、10
i = 1
while 1: # 循环条件为1必定成立
print i # 输出1~10
i += 1
if i > 10: # 当i大于10时跳出循环
break
#死循环
'''
var = 1
while var == 1 : # 该条件永远为true，循环将无限执行下去
num = raw_input("Enter a number :")
print "You entered: ", num
print "Good bye!"
'''
#while … else
count = 0
while count < 5:
print count, " is less than 5"
count = count + 1
else:
print count, " is not less than 5"
#简单语句组
flag = 1
while (flag): print 'Given flag is really true!';flag=0;
print "Good bye!"
#for语句
'''
for iterating_var in sequence:
statements(s)
'''
for letter in 'Python': # 第一个实例
print '当前字母 :', letter
fruits = ['banana', 'apple', 'mango']
for fruit in fruits: # 第二个实例
print '当前水果 :', fruit
print "Good bye!"
#序列索引迭代
fruits = ['banana', 'apple', 'mango']
for index in range(len(fruits)):
print '当前水果 :', fruits[index]
print "Good bye!"
#for...else
for num in range(10,20): # 迭代 10 到 20 之间的数字
for i in range(2,num): # 根据因子迭代
if num%i == 0: # 确定第一个因子
j=num/i # 计算第二个因子
print '%d 等于 %d * %d' % (num,i,j)
break # 跳出当前循环
else: # 循环的 else 部分
print num, '是一个质数'
#嵌套循环
i = 2
while(i < 100):
j = 2
while(j <= (i/j)):
if not(i%j): break
j = j + 1
if (j > i/j) : print i, " 是素数"
i = i + 1
print "Good bye!"
#break语句
for letter in 'Python': # First Example
if letter == 'h':
break
print 'Current Letter :', letter
var = 10 # Second Example
while var > 0:
print 'Current variable value :', var
var = var -1
if var == 5:
break
print "Good bye!"
#continue语句
for letter in 'Python': # 第一个实例
if letter == 'h':
continue
print '当前字母 :', letter
var = 10 # 第二个实例
while var > 0:
var = var -1
if var == 5:
continue
print '当前变量值 :', var
print "Good bye!"
#pass语句
# 输出 Python 的每个字母
for letter in 'Python':
if letter == 'h':
pass
print '这是 pass 块'
print '当前字母 :', letter
print "Good bye!"
#格式字符串
print "My name is %s and weight is %d kg!" % ('Zara', 21)
#时间与日期
import time; # This is required to include time module.
ticks = time.time()
print "Number of ticks since 12:00am, January 1, 1970:", ticks
localtime = time.localtime(time.time())
print "Local current time :", localtime
localtime = time.asctime( time.localtime(time.time()) )
print "Local current time :", localtime
import calendar
cal = calendar.month(2008, 1)
print "Here is the calendar:"
print cal;
网友评论