diff --git "a/\346\225\260\345\255\227\347\264\257\345\212\240.py" "b/\346\225\260\345\255\227\347\264\257\345\212\240.py"
new file mode 100644
index 0000000..f0007d0
--- /dev/null
+++ "b/\346\225\260\345\255\227\347\264\257\345\212\240.py"
@@ -0,0 +1,7 @@
+def addnum(num):
+    if num == 1:
+        return 1
+    teap = addnum(num-1)
+    return num + teap
+
+print(addnum(4))
\ No newline at end of file