Representation of signed numbers. Machine numbers (binary values that appear on computers) have three characteristics. They are represented by unsigned or signed converted values. There is no such data as +10101. Instead, it is represented by 010101, which means pure Integer or decimal, the position of the decimal point is preset at a certain position with less change. Its length is limited by computer hardware and cannot be infinitely increased. The Q format is to multiply a decimal by several times and use an integer to represent the decimal.
