Why do I need C++ int to double conversion?

You need int to double conversion in C++ when calculations require decimal precision. For example, dividing 5 / 2 as integers gives 2, but converting to double gives 2.5 with correct accuracy.

Is there any difference between implicit and explicit int to double conversion in C++?

Implicit happens automatically when you assign int to a double variable, while explicit requires casting like (double)num. Both methods work, but explicit conversion gives you full control in the program.

What happens if I don’t convert int to double in C++ calculations?

If you don’t convert int to double in C++, integer division will drop decimal values. For example, 7/2 becomes 3 instead of 3.5. Conversion ensures you always get correct results.

Is C++ int to double conversion automatic when assigning values?

If you assign an int to a double variable like double x = 15;, the compiler automatically converts it. But when doing math, you may still need explicit conversion.

Which method is best for C++ int to double conversion?

The best method is using static_cast (num) because it is modern, clear, and safe. You can also use simple assignment or C-style cast, but static_cast is recommended in professional coding.