# Why doesn't ClearAll[“Global'*”] remove all variables? [closed]

Consider the following code :

In[19]:= a = 2;

In[20]:= ClearAll["Global'*"];

In[21]:= a

Out[21]= 2


As you see, the variable a hasn't been resetted. Why ? ClearAll["Global'*"] is supposed to clear all user defined symbol : How do I clear all user defined symbols?

• $\neq$'${}{}{}$ – AccidentalFourierTransform Jun 23 '19 at 15:30
• not ClearAll["Global'*"]; but ClearAll["Global*"]; – Xminer Jun 23 '19 at 15:32