JS: Math (namespace)

What is the Keyword “Math”

Math is the value of the property key "Math" of the Global Object .

console.assert(globalThis["Math"] === Math);

Type

Type of Math is Object .

console.assert(typeof Math === "object");

Parent

Parent of Math is Object.prototype.

console.assert(Reflect.getPrototypeOf(Math) === Object.prototype);

Purpose

Purpose of Math object is as a namespace for math related functions and constants.

Properties

• JS: Math. max, min
• JS: Math. sign, abs
• JS: Math ceiling, floor, round, truncate
• JS: Math. random
• JS: Power and Roots
• JS: Math exponential and logarithm
• JS: Math constants. pi, e, sqrt, etc.
• JS: Math trig functions. sin, cos, tan, asin, acos, atan
• JS: Math hyperbolic functions. sinh, cosh, tanh, etc.
• JS: Math fround, clz32, imul

Misc

Math.hypot(x1, x2, etc)

(new in ECMAScript 2015)

Return the square root of (x1^2 + x2^2 + etc^2). This is useful to compute the length of a higher dimension vector in linear algebra.

// length of 2d unit vector
console.log(Math.hypot(1, 1));
// 1.4142135623730951

// length of 3d unit vector
console.log(Math.hypot(1, 1, 1));
// 1.7320508075688772

Math[Symbol.toStringTag]

(new in ECMAScript 2015)

value is the string "Math".