Seonglae Cho실수나 복소수가 원점으로부터 떨어진 거리를 나타내는 음이 아닌 실수
- Complex Number generalization
Absolute value
In mathematics, the absolute value or modulus of a real number , denoted , is the non-negative value of without regard to its sign. Namely, if is a positive number, and if is negative, and . For example, the absolute value of 3 is 3, and the absolute value of −3 is also 3. The absolute value of a number may be thought of as its distance from zero.
https://en.wikipedia.org/wiki/Absolute_value
