save project

diy1.py

@@ -3,3 +3,10 @@
 #要求这个函数能计算1+2+3+……+num的结果
 
 
+def sum_numbers(num):
+    if num == 1:
+        return 1
+
+    return num + sum_numbers(num - 1)
+
+print(sum_numbers(100))
\ No newline at end of file