You could try a double variable, like this:
Inside that for, you compute the values for your function, then you save these either in an array of type double, or (if you want them to be available later) into a text file.

Never use this approach in math calculations: 0.02 is a double type approximation of the real number 0.02 so 100*0.02 != 2.0.
In that case you have 100 intervals (and 101 points):
In that case you also have a ready-to-use index to place all needed values in arrays (to plot graph etc)...
To avoid time expensive conversions of i var from int type to double type you can add in the loop header auxiliary double "index" variable. As usually, no need in this optimization...