Large numbers (5e25)

Author: LuisFerLCC

src/__tests__/FloatToolkit/operations/addAndSubtract.test.ts

@@ -16,6 +16,7 @@ describe("FloatToolkit.add()", () => {
 
 		expect(ft.add([2022.1, 2022.3])).toBe(4044.4);
 		expect(ft.add([0.123, 0.456, 0.1])).toBe(0.679);
+		expect(ft.add([5e30, 7e30])).toBe(12e30);
 	});
 
 	it("should round to the default precision if and only if specified in the options", () => {
@@ -55,6 +56,7 @@ describe("FloatToolkit.subtract()", () => {
 
 		expect(ft.subtract([2022.2, 0.1])).toBe(2022.1);
 		expect(ft.subtract([0.679, 0.1])).toBe(0.579);
+		expect(ft.subtract([12e30, 7e30])).toBe(5e30);
 	});
 
 	it("should round to the default precision if and only if specified in the options", () => {

src/__tests__/FloatToolkit/operations/multiplyAndDivide.test.ts

@@ -15,6 +15,7 @@ describe("FloatToolkit.multiply()", () => {
 		expect(ft.multiply([0.1, 0.9])).toBe(0.09);
 
 		expect(ft.multiply([2022.1, 0.7])).toBe(1415.47);
+		expect(ft.multiply([2.9e31, 3.1e31])).toBe(8.99e62);
 	});
 
 	it("should round to the default precision if and only if specified in the options", () => {
@@ -52,6 +53,7 @@ describe("FloatToolkit.divide()", () => {
 		expect(ft.divide([0.09, 0.9])).toBe(0.1);
 
 		expect(ft.divide([1415.47, 0.7])).toBe(2022.1);
+		expect(ft.divide([8.99e62, 3.1e31])).toBe(2.9e31);
 
 		ft.defaultPrecision = 17;
 		expect(ft.divide([0.09, 0.9])).toBe(0.09999999999999999);

src/eval/isLargeNumber.ts

@@ -0,0 +1,4 @@
+/**
+ * @internal
+ */
+export const isLargeNumber = (n: number) => n.toString().includes("e");

src/functions/round.ts

@@ -3,6 +3,7 @@ import { precisionRange } from "../precisionRange.js";
 
 import { isNumber } from "../eval/isNumber.js";
 import { isValidPrecision } from "../eval/isValidPrecision.js";
+import { isLargeNumber } from "../eval/isLargeNumber.js";
 
 /**
  * @internal
@@ -14,5 +15,5 @@ export function round(n?: number, precision?: FloatToolkit.Precision): number {
 			`Argument for 'precision' must be an integer between ${precisionRange.min} and ${precisionRange.max - 1}.`
 		);
 
-	return Number(n!.toFixed(precision));
+	return Number(isLargeNumber(n!) ? n!.toPrecision(precision! + 1) : n!.toFixed(precision));
 }

src/get-precision/getPrecision.ts

@@ -1,12 +1,16 @@
 import FloatToolkit from "../index.js";
 
+import { isLargeNumber } from "../eval/isLargeNumber.js";
+
 /**
  * @internal
  */
 export function getPrecision(n: number): FloatToolkit.Precision {
 	const nString = n.toString();
-	const pointPosition = nString.indexOf(".") + 1;
 
+	const pointPosition = nString.indexOf(".") + 1;
 	if (pointPosition === 0) return 1;
-	return (nString.length - pointPosition) as FloatToolkit.Precision;
+
+	const ePosition = isLargeNumber(n) ? nString.indexOf("e") : nString.length;
+	return (ePosition - pointPosition) as FloatToolkit.Precision;
 }