Suppose you have an ordinary first order differential equation in the form . Input your equation's right side into the first input box. Use the next two input boxes for the initial condition. is the maximum x-value for your numerical solution. The slider for h determines the stepsize in the Euler method. The solution from the Euler method is purple. For comparison there is the orange curve, that is generated with GeoGebra's NSolveODE command, which uses a more sophisticated numerical algorithm.