auto save

demo.py

+def func(n):
+    if n <= 2:
+        return 1
+    else:
+        value = func(n-1)+func(n-2)
+        return value
+i = 3
+while True:
+    if func(i) > 100:
+        print('斐波那契数列的值大于20是第',i,'列，值是',func(12))
+        break
+    i+=1