What does Boyle's law tell us about the effect of pressure on the volume of a gas at constant temperature and fixed amount of gas?

Boyle's Law states that at constant temperature for a fixed mass, the absolute pressure and the volume of a gas are inversely proportional.

it means;

For a fixed amount of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. Or Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship, when temperature is held constant.