What is the modulo operation and what is 7 mod 3?

• A. Remainder after division; 7 mod 3 = 1.
• B. 7 mod 3 equals 2.
• C. It is the quotient after division; 7 mod 3 = 2.
• D. It rounds the result of division to the nearest integer.

Answer: (A)

Modulo operation returns the remainder after dividing one number by another. When you divide 7 by 3, 3 fits into 7 two times (2 × 3 = 6), leaving a remainder of 1. So 7 mod 3 equals 1. The quotient is 2, but modulo gives the remainder, not the quotient or a rounded value.