mathjs/lib/constants.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.

module.exports = function (math) {
  var Complex = require('./type/Complex');

  math.pi          = Math.PI;
  math.e           = Math.E;
  math.tau         = Math.PI * 2;
  math.i           = new Complex(0, 1);

  math['Infinity'] = Infinity;
  math['NaN']      = NaN;
  math['true']     = true;
  math['false']    = false;

  // uppercase constants (for compatibility with built-in Math)
  math.E           = Math.E;
  math.LN2         = Math.LN2;
  math.LN10        = Math.LN10;
  math.LOG2E       = Math.LOG2E;
  math.LOG10E      = Math.LOG10E;
  math.PI          = Math.PI;
  math.SQRT1_2     = Math.SQRT1_2;
  math.SQRT2       = Math.SQRT2;
};