This file defines functions for computing powers and roots with attention to sign, zero and negative inputs. It includes:
num pow(num base, num exponent)Computes base raised to exponent. Uses Dart’s built‑in pow for integer exponents and real exponents. Handles negative bases and non‑integer exponents by converting the result to a double. Throws if either argument is NaN.
double sqrt(num x)Computes the square root of x. Returns NaN for negative inputs (non‑complex numbers) and uses Dart’s sqrt internally for positive values.
double nthRoot(num x, int n)Computes the n‑th root of x. Handles the following cases:
n is zero, throws ArgumentError.x is zero, returns 0 (for positive n) or throws (for negative n).n is even and x is negative, returns NaN because the result would be complex.pow(x, 1/n) (as a double).These functions serve as building blocks for higher‑level math operations such as base conversion and curves. They mirror the behaviour of Dart’s built‑in pow and sqrt but provide explicit error messages and handle some edge cases differently.