Double Keyword

In C programming, the 'double' keyword is used to declare variables that hold double-precision floating-point numbers.

Double-precision means that these variables can store decimal values with higher precision and a wider range compared to the 'float' data type.

Here's an example of using the 'double' keyword to declare a variable:

double pi = 3.14159;

    

In this example, the 'double' keyword is used to declare a variable named 'pi' and initialize it with the value 3.14159.

Double-precision variables are typically used when higher precision and a wider range of decimal values are required, such as in scientific or financial calculations.

The 'double' keyword can also be used as a modifier for other data types to indicate double precision.

For example, 'double' can be used with 'int' to create a double-precision integer.

However, in most cases, 'double' is used on its own to declare double-precision floating-point variables.