save project

diy2.py

-for i in range(1,10):# 行
-    for j in range(1,i+1):
-        print(j,"*",i,"=",(j*i),end="  ")
-    print() # 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
+def a(b):
+      if b==1:
+          return 1
+      d=a(b-1)
+      return b +d
+c = a(100)
+print(c)
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