save project

diy2.py

-alist = [88, 75, 72, 82, 90, 85, 78, 91]
-n=len(alist)
-for in range(n-1)
-    for in range(n-1)
-        if alist[j]>alist[j+1]:
-            t=alist[j]
-            alist[j]=alist[j+1]
-            alist[j+1]=t
-print(alist)
\ No newline at end of file
+#定义一个函数sum_numbers()
+#要求这个函数能接收一个名为num的整型参数
+#要求这个函数能计算1+2+3+……+num的结果
+def sum_nuber(num):
+    if num==1:
+        return 1
+    else:
+        t=sum_nuber(num-1)+num
+    return t
+
+r=sum=nuber
+print(r)