Definition: A character is a small, round, and flat-shaped object that has a hole in its center. In the context of mathematics, a character is often used to represent numbers or variables in an equation. For example, in the equation 12 + 3 = 15, the letter "12" represents the number 12, while the letter "3" represents the variable x, and the letter "15" represents the constant term (the answer).
what should be said.