if and for

hacklinshell · hacklinshell · commit e1bc15957f20 · 2019-02-13T20:29:39.000+08:00
diff --git a/python基础/for.py b/python基础/for.py
@@ -0,0 +1,48 @@
+# 打印list
+names = ['bob', 'trac', 'mich']
+
+for name in names:
+    print(name)
+
+#   打印
+#   bob
+#   trac
+#   mich
+
+# 打印 0 - 9
+
+for x in range(10):
+    print(x)
+
+#累加 0 - 9
+sum = 0
+for x in range(10):
+    sum = sum + x
+print(sum)  #45
+
+# 100 以内所有奇数和
+sum = 0
+n = 99
+
+while n > 0:
+    sum = sum + n
+    n = n - 2
+print(sum)  #2500
+
+# break
+
+n = 1
+while n <= 100:
+    if n > 10:  # 当n = 11时，条件满足，执行break语句
+        break   # break语句会结束当前循环
+    print(n)
+    n = n + 1
+print('END')
+
+#continue
+n = 0
+while n < 10:
+    n = n + 1
+    if n % 2 == 0: # 如果n是偶数，执行continue语句
+        continue # continue语句会直接继续下一轮循环，后续的print()语句不会执行
+    print(n)
diff --git a/python基础/if.py b/python基础/if.py
@@ -0,0 +1,9 @@
+#input()返回的数据类型是str，str不能直接和整数比较，必须先把str转换成整数。Python提供了int()函数来完成这件事情：
+
+s = input('birth :')
+birth = int(s)
+
+if birth < 2000:
+    print('00前')
+else:
+    print('00后')
