float number is not the expected number after subtraction

Question

I have the following statement:

float diff = tempVal - m_constraint.getMinVal();

tempVal is declared as a float and the

Answer 1

Java encodes real numbers using binary floating point representations defined in IEEE 754. Like all finite representations it cannot accurately represent all real numbers because there is far more real numbers than potential representations. Numbers which cannot be represented exactly (like 0.1 in your case) are rounded to the nearest representable number.