JS: Math constants. pi, e, sqrt, etc.

By Xah Lee. Date: . Last updated: .

trig

Math.PI

π. 

console.log(Math.PI);
// 3.141592653589793

exponential and logarithm

Math.E

Constant e. The number Limit[(1+1/n)^n,{n,∞}] . 

console.log(Math.E);
// 2.718281828459045
Math.LN10

(new in ECMAScript 2015)

natural log of 10. 

console.log(Math.LN10);
// 2.302585092994046
Math.LN2

natural log of 2. 

console.log(Math.LN2);
// 0.6931471805599453
Math.LOG10E

base-10 log of e. 

console.log(Math.LOG10E);
// 0.4342944819032518
Math.LOG2E

base-2 log of e. 

console.log(Math.LOG2E);
// 1.4426950408889634

power and root

Math.SQRT2

√2

console.log(Math.SQRT2);
// 1.4142135623730951

console.log(Math.pow(2, 1 / 2));
// 1.4142135623730951
Math.SQRT1_2

1/(√2) 

console.log(Math.SQRT1_2);
// 0.7071067811865476

console.log(1 / Math.pow(2, 1 / 2));
// 0.7071067811865475

JavaScript. math functions.