Webmaster in a Nutshell, Second Edition

Name

Math — a placeholder for mathematical functions and constants

Availability

Core JavaScript 1.0; ECMA-262

Synopsis

Math.constant
Math.function()

Constants

Math.E

The mathematical constant e.

Math.LN10

The mathematical constant log _e 10.

Math.LN2

The mathematical constant log _e 2.

Math.LOG10E

The mathematical constant log ₁₀ e.

Math.LOG2E

The mathematical constant log ₂ e.

Math.PI

The mathematical constant π.

Math.SQRT1_2

The mathematical constant 1/2.

Math.SQRT2

The mathematical constant 2.

Static Functions

Math.abs(x)

Compute an absolute value.

Math.acos(x)

Compute an arc cosine.

Math.asin(x)

Compute an arc sine.

Math.atan(x)

Compute an arc tangent.

Math.atan2(x, y)

Compute the angle from the X axis to a point.

Math.ceil(x)

Round up a number.

Math.cos(x)

Compute a cosine.

Math.exp(x)

Compute e ^x .

Math.floor(x)

Round down a number.

Math.log(x)

Compute a natural logarithm.

Math.max(a, b)

Return the larger of two values.

Math.min(a, b)

Return the smaller of two values.

Math.pow(x, y)

Compute x ^y .

Math.random()

Return a pseudo-random number. JavaScript 1.1; ECMA-262.

Math.round(x)

Round to the nearest integer.

Math.sin(x)

Compute a sine.

Math.sqrt(x)

Compute a square root.

Math.tan(x)

Compute a tangent.