变更

python_04_循环语句.py

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+# while计算1-100和
+# num=0
+# i = 1
+# while i <= 100:
+#     num = num + i
+#     i += 1
+# print(num)
+
+# while循环嵌套，参考99乘法表
+
+# for语句演示
+
+# name = "i_love_python"
+# for x in name:
+#     print(x)
+# i = 0
+# name = "it_hema is a brand of it_cast"
+#
+# for x in name:
+#     if x == "a":
+#         i += 1
+# print(i)
+
+# range()语句使用
+#
+# for x in range(10):
+#     print(f"{x}\t", end='')
+# print()
+# for x in range(20, 30):
+#     print(f"{x}\t", end='')
+# print()
+# for x in range(10, 30, 3):
+#     print(f"{x}\t", end='')
+
+# for 嵌套
+
+# for i in range(101):
+#     print(f"表白地{i}天")
+#     for j in range(11):
+#         print(f"这是今天送的第{j}支花")
+
+# 循环中断 continue/break
+# for i in range(19):
+#     print(f"这是第{i}次")
+#     continue
+#     print("abc")#此代码无法访问
+
+