Math

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 2.303.
LOG2E
Base 2 logarithm of E, approximately 1.443.
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.
Properties inherited from Object:

Methods

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.
abs
Returns the absolute value (modulus) of a number. Note: modulus (%) is also an arithmetic operator.
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.
imul
Returns the result of a 32-bit integer multiplication.
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
Returns the string "Math".

Document Tags and Contributors

Contributors to this page: trucy
Last updated by: trucy,