From dcaaaed66752229d31629461d7eafb658eaf5f42 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=BA=AF=E6=B4=81=E7=9A=84=E5=BE=AE=E7=AC=91?=
 <ityouknow@126.com>
Date: Sun, 18 Aug 2019 20:35:58 +0800
Subject: [PATCH] =?UTF-8?q?Python=20=E6=B5=81=E7=A8=8B=E6=8E=A7=E5=88=B6?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 day-003/Dictionary.py |  1 -
 day-004/break.py      |  4 ++++
 day-004/continue.py   |  4 ++++
 day-004/for.py        | 18 ++++++++++++++++++
 day-004/if.py         | 11 +++++++++++
 day-004/pass.py       |  8 ++++++++
 day-004/range.py      | 17 +++++++++++++++++
 day-004/while.py      | 16 ++++++++++++++++
 8 files changed, 78 insertions(+), 1 deletion(-)
 create mode 100644 day-004/break.py
 create mode 100644 day-004/continue.py
 create mode 100644 day-004/for.py
 create mode 100644 day-004/if.py
 create mode 100644 day-004/pass.py
 create mode 100644 day-004/range.py
 create mode 100644 day-004/while.py

diff --git a/day-003/Dictionary.py b/day-003/Dictionary.py
index e71e857..69532f1 100644
--- a/day-003/Dictionary.py
+++ b/day-003/Dictionary.py
@@ -8,5 +8,4 @@
 print (Logo_code['SINA'])       # 输出键为 'one' 的值
 print (Logo_code.keys())   # 输出所有键
 print (Logo_code.values()) # 输出所有值
-
 print (len(Logo_code))  # 输出字段长度
\ No newline at end of file
diff --git a/day-004/break.py b/day-004/break.py
new file mode 100644
index 0000000..42ce78f
--- /dev/null
+++ b/day-004/break.py
@@ -0,0 +1,4 @@
+for letter in 'ityouknow':     # 第一个实例
+   if letter == 'n':        # 字母为 n 时中断
+      break
+   print ('当前字母 :', letter)
\ No newline at end of file
diff --git a/day-004/continue.py b/day-004/continue.py
new file mode 100644
index 0000000..7c33c14
--- /dev/null
+++ b/day-004/continue.py
@@ -0,0 +1,4 @@
+for letter in 'ityouknow':     # 第一个实例
+   if letter == 'n':        # 字母为 n 时跳过输出
+      continue
+   print ('当前字母 :', letter)
\ No newline at end of file
diff --git a/day-004/for.py b/day-004/for.py
new file mode 100644
index 0000000..36b22e9
--- /dev/null
+++ b/day-004/for.py
@@ -0,0 +1,18 @@
+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!")
+
+
+
+# 通过索引循环
+
+fruits = ['banana', 'apple',  'mango']
+for index in range(len(fruits)):
+   print('当前水果 :', fruits[index])
+
+print("Good bye!")
\ No newline at end of file
diff --git a/day-004/if.py b/day-004/if.py
new file mode 100644
index 0000000..95db858
--- /dev/null
+++ b/day-004/if.py
@@ -0,0 +1,11 @@
+#x = int(input("Please enter an integer: "))
+x = -5
+if  x < 0:
+	x = 0
+	print('Negative changed to zero')
+elif x == 0:
+	print('Zero')
+elif x == 1:
+	print('Single')
+else:
+	print('More')
\ No newline at end of file
diff --git a/day-004/pass.py b/day-004/pass.py
new file mode 100644
index 0000000..eb59c2a
--- /dev/null
+++ b/day-004/pass.py
@@ -0,0 +1,8 @@
+while True:
+	pass  # Busy-wait for keyboard interrupt (Ctrl+C)
+
+
+# 这通常用于创建最小结构的类:
+
+class MyEmptyClass:
+	pass
diff --git a/day-004/range.py b/day-004/range.py
new file mode 100644
index 0000000..f5c5a58
--- /dev/null
+++ b/day-004/range.py
@@ -0,0 +1,17 @@
+for i in range(6):
+ print(i)
+print(range(6),'finish')
+
+for i in range(6,10):
+ print(i)
+print(range(6,10),'finish')
+
+for i in range(6,12,2):
+ print(i)
+print(range(6,12,2),'finish')
+
+
+# 迭代链表
+a = ['i', 'love', 'coding', 'and', 'free']
+for i in range(len(a)):
+	print(i, a[i])
\ No newline at end of file
diff --git a/day-004/while.py b/day-004/while.py
new file mode 100644
index 0000000..76d2cf3
--- /dev/null
+++ b/day-004/while.py
@@ -0,0 +1,16 @@
+#!/usr/bin/python
+ 
+count = 0
+while (count < 9):
+   print('The count is:', count)
+   count = count + 1
+ 
+print("Good bye!")
+
+
+count = 0
+while count < 6:
+   print(count, " is  less than 6")
+   count = count + 1
+else:
+   print(count, " is not less than 6")
\ No newline at end of file