diff --git a/260421 09.py b/260421 09.py
new file mode 100644
index 0000000..fe7e407
--- /dev/null
+++ b/260421 09.py	
@@ -0,0 +1,14 @@
+s = "Hello"
+for char in s:
+    print(f"{char}的ASCII码:{ord(char)}")
+    print(f"ASCII码65对应的字符:{chr(65)}")
+#因为图像是计算机天生能理解的数值，文本是需要“翻译+理解”的人类语言
+
+A = [3,4]
+B = [1,2]
+add_res = [A[0]+B[0],A[1]+B[1]]
+print("1.A+B=",add_res)
+mul_res = [2*A[0],2*A[1]]
+print("2.2xA=",mul_res)
+mod_A = pow(A[0]**2+A[1]**2,0.5)
+print("3.向量A的模=",mod_A)
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