Nest
Nest[f, expr, n] returns f wrapped around expr n times.
Attributes[Nest] := {Protected}
Simple examples
In[1]:= Nest[f, x, 3] Out[1]= f[f[f[x]]]
In[2]:= Nest[Function[Slot[1]^2], {1, 2, 3}, 3] Out[2]= {1, 256, 6561}
Nest[f, expr, n] returns f wrapped around expr n times.
Attributes[Nest] := {Protected}
In[1]:= Nest[f, x, 3] Out[1]= f[f[f[x]]]
In[2]:= Nest[Function[Slot[1]^2], {1, 2, 3}, 3] Out[2]= {1, 256, 6561}