#isNaN

Returns whether the receiver represents NaN.

import { Arith } from "@teakit/arith";

const x = Arith.from("NaN");
x.isNaN(); // true

const y = Arith.from("Infinity");
y.isNaN(); // false

Arith.from("1").isNaN(); // false

#API Reference

#Signature

isNaN(): boolean;

#Parameters

#Returns

Returns a boolean.

#Throws

• Does not take user arguments; no argument validation is performed.

#Agent Contract

#Agent Notes

• Use predicate methods instead of inspecting c, e, or s directly.
• Import with import { Arith } from "@teakit/arith"; default imports are unsupported.
• Use Arith.from(...) to create values. Do not generate new Arith(...) or Arith(...).
• Use string inputs for exact decimal values, especially money-like values.
• Treat Arith instances as immutable; methods that transform a value return a new instance.
• Do not mutate internal fields such as c, e, s, or _isArith.