mathjs/lib/esm/plain/number/constants.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif

export var pi = Math.PI;
export var tau = 2 * Math.PI;
export var e = Math.E;
export var phi = 1.6180339887498948; // eslint-disable-line no-loss-of-precision