Hello All, Please help me if anyone have nice idea. I want to replace Array elements based on certain conditions. As per attached Sample, I have fixed character Array & Some Random values with Array Size. Here, I need to check Random char with fixed Array. If char is not matching then I need to replace that index value with “NaN”. Once it is matching for one time then next time I need to display Run time value for that particular index.

Yes, you have way too much code for such a simple problem. Also, your random character generator is flawed, because A and Z will only occur at half the probability of the other characters. Here's a quick draft how it could be done with less code (LV 2012). Modify as needed. I am sure more simplifications are possible....