NDSolve
NDSolve[eqns, u, {x, xmin, xmax}] finds a numerical solution to the ordinary differential equations eqns for the function u with independent variable x in the specified range.
Examples
Solve a simple ODE numerically:
sol = NDSolve[{y'[x] == y[x], y[0] == 1}, y, {x, 0, 5}]Plot the solution:
Plot[Evaluate[y[x] /. sol], {x, 0, 5}]Please visit the official Wolfram Language Reference for more details.