ListQ
ListQ[expr]
checks if expr
has a head of List
.
Attributes[ListQ] := {Protected}
Simple examples
In[1]:= ListQ[{a}] Out[1]= True
In[2]:= ListQ[a] Out[2]= False
In[3]:= ListQ[{}] Out[3]= True
ListQ[expr]
checks if expr
has a head of List
.
Attributes[ListQ] := {Protected}
In[1]:= ListQ[{a}] Out[1]= True
In[2]:= ListQ[a] Out[2]= False
In[3]:= ListQ[{}] Out[3]= True