Table of contents
- 1. Summary
- 2. Description
- 3. Properties
- 4. Methods
Summary
A built-in object that has properties and methods for mathematical constants and functions.
Description
Unlike the other global objects, Math is not a constructor. All properties and methods of Math are static. You refer to the constant pi as Math.PI and you call the sine function as Math.sin(x), where x is the method's argument. Constants are defined with the full precision of real numbers in JavaScript.
Properties
- E
- Euler's constant and the base of natural logarithms, approximately 2.718.
- LN2
- Natural logarithm of 2, approximately 0.693.
- LN10
- Natural logarithm of 10, approximately 2.302.
- LOG2E
- Base 2 logarithm of E, approximately 1.442.
- LOG10E
- Base 10 logarithm of E, approximately 0.434.
- PI
- Ratio of the circumference of a circle to its diameter, approximately 3.14159.
- SQRT1_2
- Square root of 1/2; equivalently, 1 over the square root of 2, approximately 0.707.
- SQRT2
- Square root of 2, approximately 1.414.
Methods
- abs
- Returns the absolute value (modulus) of a number.
Note that the trigonometric functions (sin, cos, tan, asin, acos, atan, atan2) expect or return angles in radians - to convert radians to degrees divide by (Math.PI / 180), and multiply by this to convert the other way.
- acos
- Returns the arccosine of a number.
- asin
- Returns the arcsine of a number.
- atan
- Returns the arctangent of a number.
- atan2
- Returns the arctangent of the quotient of its arguments.
- ceil
- Returns the smallest integer greater than or equal to a number.
- cos
- Returns the cosine of a number.
- exp
- Returns Enumber, where number is the argument, and E is Euler's constant (2.718...), the base of the natural logarithm.
- floor
- Returns the largest integer less than or equal to a number.
- log
- Returns the natural logarithm (loge, also ln) of a number.
- max
- Returns the largest of zero or more numbers.
- min
- Returns the smallest of zero or more numbers.
- pow
- Returns base to the exponent power, that is, baseexponent.
- random
- Returns a pseudo-random number between 0 and 1.
- round
- Returns the value of a number rounded to the nearest integer.
- sin
- Returns the sine of a number.
- sqrt
- Returns the positive square root of a number.
- tan
- Returns the tangent of a number.
- toSource
- Non-standard
- Returns the string
"Math".
Methods inherited from
Object:__defineGetter__, __defineSetter__, hasOwnProperty, isPrototypeOf, __lookupGetter__, __lookupSetter__, __noSuchMethod__, propertyIsEnumerable, toLocaleString, toString, unwatch, valueOf, watch
