In C++, what is the keyword 'float' used for?

The keyword 'float' in C++ is specifically used to define a floating-point number. Floating-point numbers are a representation of real numbers that can hold fractional parts, making them useful for calculations requiring precision, such as scientific computations, graphics, or any arithmetic operations involving real-world measurements.

In C++, using 'float' allows programmers to allocate a variable that can store numbers with decimals, typically using 32 bits of memory. This contrasts with integer types, which store whole numbers without fractional components. The ability to represent decimal values is crucial in a wide range of applications, making 'float' an essential data type in C++. The keyword thus serves a very important role in ensuring that programs can handle real number computations correctly and efficiently.