diff --git a/SDF.PY b/SDF.PY
new file mode 100644
index 0000000..d074bd6
--- /dev/null
+++ b/SDF.PY
@@ -0,0 +1,4 @@
+for i in range(1,10):
+    for j in range(1,1+i):
+        print(j,'*',i,'=',(j*i),end=" ")
+    print()
\ No newline at end of file
diff --git a/diy2.py b/diy2.py
new file mode 100644
index 0000000..6691fec
--- /dev/null
+++ b/diy2.py
@@ -0,0 +1,4 @@
+i = 5   # 行
+j = 3   # 列
+# 使用变量i和j，代替乘法算式里面的元素，打印出单个乘法算式
+print(i,'*',j,'=',(i*j))
\ No newline at end of file