The effect of varying the step size ∆x on the results for different values of time increment are shown in Tables 2-4. It should be noted here that the number of elements is 1/∆x, therefore, a direct comparison between the results for different values of ∆x will not always be possible. Table 2 shows that almost identical results are obtained when ∆x is increased from 0.01 to five or even ten times its value (results for ∆x = 0.01, 0.05, and 0.1). Tables 3 and 4 show the effect of varying the step size ∆x from 0.1 through 0.5 for ∆t = 0.01 and 0.02, respectively. Both tables show no oscillations. Figure 2 shows the results for ∆x = 0.01, 0.1, 0.2, and 0.25 for ∆t = 0.02. This figure shows that whether 100 elements or 4 elements are used, the analytical-numerical method provides almost the same results.