#add

Adds another value to the receiver and returns the exact decimal sum.

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

0.1 + 0.2; // 0.30000000000000004

const x = Arith.from("0.1");
const y = x.add("0.2");
y.toString(); // "0.3"

// Chain additions without converting through JavaScript numbers.
Arith.from("0.7").add(x).add(y).toString(); // "1.1"

// Use the (string, base) overload when the addend is written in another base.
x.add("0.1", 8).toString(); // "0.225"

// The receiver is not mutated.
x.toString(); // "0.1"

// Use the static helper when no method chain is needed.
Arith.add("1", "2").toString(); // "3"
Arith.add("0.1", "0.2").toString(); // "0.3"

#API Reference

#Signature

add(n: ArithValue): ArithInstance;
add(n: string, base: number): ArithInstance;

#Parameters

#Returns

Returns a new Arith instance. The receiver is not modified.

#Throws

• Throws if base is invalid.
• Throws if the input value is invalid while STRICT is true.

#Agent Contract

#Agent Notes

• Do not use JavaScript arithmetic operators on Arith values.
• 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.