Given a continuous function  the following applet helps you to visualize and compute approximate values of  by various methods. You can select  a function from the drop down list or enter your own

 function. Select  values of the internal end-points   a   and   b  ,  a < b  by moving the sliders you can increase the

 size  and enter the size of the partition  n   by clicking the *2>>  button . A method for computing the approximate

 integral can be selected from the drop down menu