From Hack Wars Wiki
A float is a number containing a decimal point, representing a fraction. Floats, as with other variables, are defined by naming the type, and then giving the variable a name. After the variable has been defined, it can either be initialised on the same line, or further on in the code.
float float_name = value;
float pi = 3.141;
float pi; pi = 3.141;
float pi = 3.141; float r = 25.0; float area = pi * r * r;
float area = 3.141 * 25.0 * 25.0;