  In this paper, we solve Laplace equation analytically by using differential
transform method. For this purpose, we consider four models with two Dirichlet
and two Neumann boundary conditions and obtain the corresponding exact
solutions. The obtained results show the simplicity of the method and massive
reduction in calculations when one compares it with other iterative methods,
available in literature. It is worth mentioning that here only a few number of
iterations are required to reach the closed form solutions as series expansions
of some known functions.
