Question

What is the real data type and how is it declared in C++?

Answer 1

The real data type in C++ refers to floating-point types like float, double, and long double, which are used for numerical values with fractional parts. These variables are declared by specifying the type followed by the variable name.

Step-by-step explanation:

The real data type in C++ is a floating-point data type that is used to store numerical values with fractional parts. It can represent both very small and very large numbers, and it is typically used when more precision is required than what is provided by the integer data type. In C++, the most common real data types are float, double, and long double.

To declare a variable with a real data type in C++, you use one of the following syntaxes based on the precision you need:

• float variableName; - Declares a variable with single precision floating-point.
• double variableName; - Declares a variable with double precision floating-point.
• long double variableName; - Declares a variable with extended precision floating-point.

Here is an example of declaring a real variable in C++:

double pi = 3.14159;