An unsteady squeezing flow of Casson fluid having magnetohydrodynamic (MHD) effect and passing through porous medium\nchannel is modeled and investigated. Similarity transformations are used to convert the partial differential equations (PDEs) of non-\nNewtonian fluid to a highly nonlinear fourth-order ordinary differential equation (ODE). The obtained boundary value problem\nis solved analytically by Homotopy Perturbation Method (HPM) and numerically by explicit Runge-Kutta method of order 4. For\nvalidity purpose, we compare the analytical and numerical results which show excellent agreement. Furthermore, comprehensive\ngraphical analysis has been made to investigate the effects of various fluid parameters on the velocity profile. Analysis shows that\npositive and negative squeeze number
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