Computer Science for IGCSE & O level - Algorithm Design And Problem Solving (Section 7 - No. 8)
What are the steps in using a check digit algorithm?
Divide, multiply, and subtract.
Multiply, add, and divide.
Add, multiply, and subtract.
Subtract, multiply, and add.
Giải thích
Check digit algorithms often involve multiplying each digit by a specific weight, adding the products, and then finding the remainder after division by a certain value. This is typically done to detect errors in the input.