LeafCount
LeafCount[e] returns the count of leaves in e.
Attributes[LeafCount] := {Protected}
Simple examples
In[1]:= LeafCount[a + b] Out[1]= 3
In[2]:= LeafCount[a^2 + b^Factorial[c]] Out[2]= 8
In[3]:= LeafCount[a] Out[3]= 1
LeafCount[e] returns the count of leaves in e.
Attributes[LeafCount] := {Protected}
In[1]:= LeafCount[a + b] Out[1]= 3
In[2]:= LeafCount[a^2 + b^Factorial[c]] Out[2]= 8
In[3]:= LeafCount[a] Out[3]= 1