Final answer:
Floating-point types in programming hold real numbers, including those with fractional parts, making them useful for a wide range of scientific computations.
Step-by-step explanation:
In the context of programming and given that all variables and constants are required to be floating-point types, the type of values they will hold are real numbers. This includes numbers that can have a fractional part, such as 3.14, 0.01, and -2.718. Floating-point numbers can represent a huge range of values and are particularly useful in scientific computations where values can be very large or very small and need to be represented with varying degrees of precision.
Floating-point types are designed to model real numbers in a way that can accommodate the vast range of values that occur in scientific calculations. This makes them ideal for situations where approximation and the representation of very large or small numbers are necessary.