How can you convert an integer to a float in C++?

Converting an integer to a float in C++ can be performed using typecasting, which is a fundamental concept in programming to change one data type to another. The correct approach is to use static_cast, which specifically provides a way to perform safe type conversions in C++. Using static_cast<float>(i) would convert the integer i to a float, ensuring that the conversion adheres to C++'s strong type-checking rules.

While performing a direct assignment, as mentioned in the first option, does work and automatically converts the integer to a float during the assignment, utilizing static_cast explicitly indicates the programmer's intent for type conversion, potentially making the code clearer and safer.

Applying a mathematical formula, like multiplication by 1.0 or similar methods, can also convert an integer to a float, but this is less straightforward and might introduce unnecessary complexity. Just creating a new float variable without any assignment does not accomplish the conversion task, as it lacks any linkage to the existing integer value. This highlights that the most reliable and clear method for type conversion in C++ is through static_cast.