Error

Question

If i had 500 coding line e.g and many of programming commands what should i do if I had an error on line 39 e.g and i had reviewed it and found nothing false in that line but I was too lazy to review every line to see where the error existed ? Then what's the best way should I behave in to handle this error i had?
In general ....
What are you gonna do or the steps you take when you have an error in your program in order to solving it?
" Assuming that you are very lazy person "

Answer 1

If you know the problem area, set a breakpoint there and use the debugger to track values a step at a time in your code. You can watch each variable to see what it does.

Answer 2

Debugging. Look up where line 39 is called. Follow it up.