Is this possible in if-else loop?

Question

double overall_mark = 80.0
if(overall_mark>70)
grade = 'A';
else grade = 'B';
is it possible to compare?

Answer 1

i wonder if we can use checking
if(80.0>70)
is it right way of coding?
comparing if double value > int value.
I see two different questions here, and I'm not sure which you're really asking:
1) "Can we compare double to int like this?" ("i wonder if we can use checking")
2) "Should we compare double to int like this?" ("is it right way of coding?")
If your question is number 1, then just try it and find out.
If your question is number 2, then it's fine to make those kinds of comparisons, as long as you're aware of promotion rules and the risks of comparing a float or double to zero for equality--that is, there's nothing wrong with it in terms of coding style, but you need to understand what's actually happening so that you're not surprised by the behavior.