#sub

Subtracts another value from the receiver and returns the exact decimal difference.

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

0.3 - 0.1; // 0.19999999999999998

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

// Chain subtraction with Arith values.
Arith.from("1").sub(x).sub(y).toString(); // "0.5"

// Use the (string, base) overload when the subtrahend is written in another base.
x.sub("0.6", 20).toString(); // "0"

// The receiver is not mutated.
x.toString(); // "0.3"

// Use the static helper when no method chain is needed.
Arith.sub("5", "2").toString(); // "3"

#API Reference

#Signature

sub(n: ArithValue): ArithInstance;
sub(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.