How to define a floating-point variable in Java?

In Java, you can define floating-point variables using the keywords float and double. For example:

float floatValue = 3.14f;
double doubleValue = 2.71828;

The float data type is used to define single-precision floating point numbers, occupying 4 bytes, while the double data type is used to define double-precision floating point numbers, occupying 8 bytes. It’s important to note that when assigning values to a float type, it is necessary to add “f” or “F” after the value to indicate that it is a float type value, otherwise it will default to the double type.