Scientific Notation Formatter

A TypeScript library for formatting numbers in various scientific notation representations including HTML, LaTeX, and MathML.

Features

• Convert numbers to scientific notation with configurable precision
• Multiple output formats:
  • Standard scientific notation (e.g., 1.23e6)
  • LaTeX (1.23 \times 10^{6})
  • MathML (<math><mrow><mn>1.23</mn><mo>×</mo><msup><mn>10</mn><mn>6</mn></msup></mrow></math>)
  • HTML (1.23 × 10<sup>6</sup>)
• Precise control over significant figures
• Standardized exponents (steps of 3)
• Zero handling
• Typescript types included

Installation

npm install @sctg/scientific-notation

Usage

import { ScientificNotation } from '@sctg/scientific-notation';

// Basic usage
const number = 1234567.89;
const precision = 4;

// Standard scientific notation
console.log(ScientificNotation.toScientificNotationString(number, precision));
// Output: "1.235e6"

// LaTeX format
console.log(ScientificNotation.toScientificNotationLatex(number, precision));
// Output: "1.235 \times 10^{6}"

// HTML format
console.log(ScientificNotation.toScientificNotationHTML(number, precision));
// Output: "1.235 × 10<sup>6</sup>"

// MathML format
console.log(ScientificNotation.toScientificNotationMathML(number, precision));
// Output: "<math><mrow><mn>1.235</mn><mo>×</mo><msup><mn>10</mn><mn>6</mn></msup></mrow></math>"

API Reference

toScientificNotation(value: number, precision?: number): ScientificNotationNumber

Converts a number to scientific notation components.

const result = ScientificNotation.toScientificNotation(1234.56, 3);
// Returns: { mantissa: 1.23, exponent: 3 }

toScientificNotationString(value: number, precision?: number): string

Returns a string representation in scientific notation.

toScientificNotationLatex(value: number, precision?: number): string

Returns a LaTeX formatted string.

toScientificNotationMathML(value: number, precision?: number): string

Returns a MathML formatted string.

toScientificNotationHTML(value: number, precision?: number): string

Returns an HTML formatted string.

Types

type ScientificNotationNumber = {
  mantissa: number;  // The coefficient
  exponent: number;  // The power of 10
};

Features

• Standardizes exponents in steps of 3
• Maintains precision with trailing zeros
• Handles special cases (zero, small numbers)
• Type-safe with TypeScript

Contributing

1. Fork the repository
2. Create your feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add some amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

License

Copyright (c) 2024-2025 Ronan LE MEILLAT

This project is licensed under the GNU Affero General Public License v3.0 - see the LICENSE file for details.

Author

Ronan LE MEILLAT
SCTG Development

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