In
 Usage
• In[n] is a global object that is assigned to have a delayed value of the n input line. • In[n] 是一个全局变量，它被分配有一个 n 输入行的延迟值。
Notes
• 打印 In[n] 引起 n 输入行被重新计算。 • In[ ] 给出最后的输入行。 • In[-k] 给出向后的 k 个输入行。
 Further Examples
Here is a small computation.
In[1]:=
|
Out[1]=
|
Either one of these gives the value of the previous line of input.
In[2]:=
|
Out[2]=
|
|
