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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
+    temp =num + sum_numbers(num-1)
+    return  temp 
+haha = sum_numbers(80)
+print(haha)
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