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JavaScript Math Object Reference

Math Object Methods

FF: Firefox, N: Netscape, IE: Internet Explorer

Method	Description	FF	N	IE
abs(x)	Returns the absolute value of a number	1	2	3
acos(x)	Returns the arccosine of a number	1	2	3
asin(x)	Returns the arcsine of a number	1	2	3
atan(x)	Returns the arctangent of x as a numeric value between -PI/2 and PI/2 radians	1	2	3
atan2(y,x)	Returns the angle theta of an (x,y) point as a numeric value between -PI and PI radians	1	2	3
ceil(x)	Returns the value of a number rounded upwards to the nearest integer	1	2	3
cos(x)	Returns the cosine of a number	1	2	3
exp(x)	Returns the value of E^x	1	2	3
floor(x)	Returns the value of a number rounded downwards to the nearest integer	1	2	3
log(x)	Returns the natural logarithm (base E) of a number	1	2	3
max(x,y)	Returns the number with the highest value of x and y	1	2	3
min(x,y)	Returns the number with the lowest value of x and y	1	2	3
pow(x,y)	Returns the value of x to the power of y	1	2	3
random()	Returns a random number between 0 and 1	1	2	3
round(x)	Rounds a number to the nearest integer	1	2	3
sin(x)	Returns the sine of a number	1	2	3
sqrt(x)	Returns the square root of a number	1	2	3
tan(x)	Returns the tangent of an angle	1	2	3
toSource()	Represents the source code of an object	1	4	-
valueOf()	Returns the primitive value of a Math object	1	2	4

Math Object Properties

Property	Description	FF	N	IE
constructor	A reference to the function that created the object	1	2	4
E	Returns Euler's constant (approx. 2.718)	1	2	3
LN2	Returns the natural logarithm of 2 (approx. 0.693)	1	2	3
LN10	Returns the natural logarithm of 10 (approx. 2.302)	1	2	3
LOG2E	Returns the base-2 logarithm of E (approx. 1.414)	1	2	3
LOG10E	Returns the base-10 logarithm of E (approx. 0.434)	1	2	3
PI	Returns PI (approx. 3.14159)	1	2	3
prototype	Allows you to add properties and methods to the object	1	2	4
SQRT1_2	Returns the square root of 1/2 (approx. 0.707)	1	2	3
SQRT2	Returns the square root of 2 (approx. 1.414)	1	2	3

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