TopLevel
Class Math
Object
Math
Mathematical functions and constants.
Constants
E  :  Number
The constant e, which is the base of natural logarithms.
LN10  :  Number
The natural logarithm of 10.
LN2  :  Number
The natural logarithm of 2.
LOG10E  :  Number
The base-10 logarithm of e.
LOG2E  :  Number
The base-2 logarithm of e.
PI  :  Number
The constant for PI.
SQRT1_2  :  Number
1 divided by the square root of 2.
SQRT2  :  Number
The square root of 2.
Constructor Summary
Math()
Method Summary
static abs(x : Number) : Number
Returns the absolute value of x.
static acos(x : Number) : Number
Returns an approximation to the arc cosine of x.
static asin(x : Number) : Number
Returns an approximation to the arc sine of x.
static atan(x : Number) : Number
Returns an approximation to the arc tangent of x.
static atan2(y : Number, x : Number) : Number
Returns an approximation to the arc tangent of the quotient y/x of the arguments y and x, where the signs of y and x are used to determine the quadrant of the result.
static ceil(x : Number) : Number
Returns the smallest (closest to -∞) number value that is not less than x and is equal to a mathematical integer.
static cos(x : Number) : Number
Returns an approximation to the cosine of x.
static exp(x : Number) : Number
Returns an implementation-dependent approximation to the exponential function of x (e raised to the power of x, where e is the base of the natural logarithms).
static floor(x : Number) : Number
Returns the greatest (closest to +∞) number value that is not greater than x and is equal to a mathematical integer.
static log(x : Number) : Number
Returns an implementation-dependent approximation to the natural logarithm of x.
static max(values : Number...) : Number
Returns the largest specified values.
static min(values : Number...) : Number
Returns the smallest of the specified values.
static pow(x : Number, y : Number) : Number
Returns an approximation to the result of raising x to the power y.
static random() : Number
Returns a number value with positive sign, greater than or equal to 0 but less than 1, chosen randomly or pseudo randomly with approximately uniform distribution over that range, using an implementation-dependent algorithm or strategy.
static round(x : Number) : Number
Returns the number value that is closest to x and is equal to a mathematical integer.
static sin(x : Number) : Number
Returns an approximation to the sine of x.
static sqrt(x : Number) : Number
Returns an approximation to the square root of x.
static tan(x : Number) : Number
Returns an approximation to the tangent of x.
Methods inherited from class Object
hasOwnProperty, isPrototypeOf, propertyIsEnumerable, toLocaleString, toString, valueOf
Constructor Detail
Math
public Math()
Method Detail
abs
static abs(x : Number) : Number
Returns the absolute value of x. The result has the same magnitude as x but has positive sign.
  • If x is NaN, the result is NaN.
  • If x is -0, the result is +0.
  • If x is -∞, the result is +∞.
Parameters:
x - the Number to operate on.
Returns:
the absolute value of x.
acos
static acos(x : Number) : Number
Returns an approximation to the arc cosine of x. The result is expressed in radians and ranges from +0 to +p.
  • If x is NaN, the result is NaN.
  • If x is greater than 1, the result is NaN.
  • If x is less than -1, the result is NaN.
  • If x is exactly 1, the result is +0.
Parameters:
x - the Number to operate on.
Returns:
an approximation to the arc cosine of x.
asin
static asin(x : Number) : Number
Returns an approximation to the arc sine of x. The result is expressed in radians and ranges from -p/2 to +p/2.
  • If i is NaN, the result is NaN
  • If i is greater than 1, the result is NaN.
  • If i is less than -1, the result is NaN.
  • If i is +0, the result is +0.
  • If i is -0, the result is -0.
Parameters:
x - the Number to operate on.
Returns:
an approximation to the arc sine of x.
atan
static atan(x : Number) : Number
Returns an approximation to the arc tangent of x. The result is expressed in radians and ranges from -p/2 to +p/2.
  • If x is NaN, the result is NaN.
  • If x is +0, the result is +0.
  • If x is -0, the result is -0.
  • If x is +∞, the result is an approximation to +p/2.
  • If x is -∞, the result is an approximation to -p/2.
Parameters:
x - the Number to operate on.
Returns:
an approximation to the arc tangent of x.
atan2
static atan2(y : Number, x : Number) : Number
Returns an approximation to the arc tangent of the quotient y/x of the arguments y and x, where the signs of y and x are used to determine the quadrant of the result. Note that it is intentional and traditional for the two-argument arc tangent function that the argument named y be first and the argument named x be second. The result is expressed in radians and ranges from -p to +p.
  • If either x or y is NaN, the result is NaN.
  • If y>0 and x is +0, the result is an implementation-dependent approximation to +p/2.
  • If y>0 and x is -0, the result is an implementation-dependent approximation to +p/2.
  • If y is +0 and x>0, the result is +0.
  • If y is +0 and x is +0, the result is +0.
  • If y is +0 and x is -0, the result is an implementation-dependent approximation to +p.
  • If y is +0 and X<0, the result is an implementation-dependent approximation to +p.
  • If y is -0 and x>0, the result is -0.
  • If y is -0 and x is +0, the result is -0.
  • If y is -0 and x is -0, the result is an implementation-dependent approximation to -p.
  • If y is -0 and X<0, the result is an implementation-dependent approximation to -p.
  • If y<0 and x is +0, the result is an implementation-dependent approximation to -p/2.
  • If y<0 and x is -0, the result is an implementation-dependent approximation to -p/2.
  • If y>0 and y is finite and x is +∞, the result is +0.
  • If y>0 and y is finite and x is -∞, the result if an implementation-dependent approximation to +p.
  • If y<0 and y is finite and x is +∞, the result is -0.
  • If y<0 and y is finite and x is -∞, the result is an implementation-dependent approximation to -p.
  • If y is +∞ and x is finite, the result is an implementation-dependent approximation to +p/2.
  • If y is -∞ and x is finite, the result is an implementation-dependent approximation to -p/2.
  • If y is +∞ and x is +∞, the result is an implementation-dependent approximation to +p/4.
  • If y is +∞ and x is -∞, the result is an implementation-dependent approximation to +3p/4.
  • If y is -∞ and x is +∞, the result is an implementation-dependent approximation to -p/4.
  • If y is -∞ and x is -∞, the result is an implementation-dependent approximation to -3p/4.
Parameters:
y - the first argument.
x - the second argument.
Returns:
approximation to the arc tangent of the quotient y/x of the arguments y and x, where the signs of y and x are used to determine the quadrant of the result.
ceil
static ceil(x : Number) : Number
Returns the smallest (closest to -∞) number value that is not less than x and is equal to a mathematical integer. If x is already an integer, the result is x.
  • If x is NaN, the result is NaN.
  • If x is +0, the result is +0.
  • If x is -0, the result is -0.
  • If x is +∞, the result is +∞.
  • If x is -∞, the result is -∞.
  • If x is less than 0 but greater than -1, the result is -0.
The value of Math.ceil(x) is the same as the value of -Math.floor(-x).
Parameters:
x - the Number to operate on.
Returns:
the smallest (closest to -∞) number value that is not less than x and is equal to a mathematical integer.
cos
static cos(x : Number) : Number
Returns an approximation to the cosine of x. The argument is expressed in radians.
  • If x is NaN, the result is NaN.
  • If x is +0, the result is 1.
  • If x is -0, the result is 1.
  • If x is +∞, the result is NaN.
  • If x is -∞, the result is NaN.
Parameters:
x - the Number to operate on.
Returns:
an approximation to the cosine of x.
exp
static exp(x : Number) : Number
Returns an implementation-dependent approximation to the exponential function of x (e raised to the power of x, where e is the base of the natural logarithms).
  • If x is NaN, the result is NaN.
  • If x is +0, the result is 1.
  • If x is -0, the result is 1.
  • If x is +∞, the result is +∞.
  • If x is -∞, the result is +0.
Parameters:
x - the Number to operate on.
Returns:
an implementation-dependent approximation to the exponential function of x.
floor
static floor(x : Number) : Number
Returns the greatest (closest to +∞) number value that is not greater than x and is equal to a mathematical integer. If x is already an integer, the result is x.
  • If x is NaN, the result is NaN.
  • If x is +0, the result is +0.
  • If x is -0, the result is -0.
  • If x is +∞, the result is +∞.
  • If x is -∞, the result is -∞.
  • If x is greater than 0 but less than 1, the result is +0.
The value of Math.floor(x) is the same as the value of -Math.ceil(-x).
Parameters:
x - the Number to operate on.
Returns:
the greatest (closest to +∞) number value that is not greater than x and is equal to a mathematical integer.
log
static log(x : Number) : Number
Returns an implementation-dependent approximation to the natural logarithm of x.
  • If x is NaN, the result is NaN.
  • If x is less than 0, the result is NaN.
  • If x is +0 or -0, the result is -∞.
  • If x is 1, the result is +0.
  • If x is +∞, the result is +∞.
Parameters:
x - the Number to operate on.
Returns:
an implementation-dependent approximation to the natural logarithm of x.
max
static max(values : Number...) : Number
Returns the largest specified values. If no arguments are given, the result is -∞. If any value is NaN, the result is NaN.
Parameters:
values - zero or more values.
Returns:
the largest of the specified values.
min
static min(values : Number...) : Number
Returns the smallest of the specified values. If no arguments are given, the result is +∞. If any value is NaN, the result is NaN.
Parameters:
values - zero or more values.
Returns:
the smallest of the specified values.
pow
static pow(x : Number, y : Number) : Number
Returns an approximation to the result of raising x to the power y.
  • If y is NaN, the result is NaN.
  • If y is +0, the result is 1, even if x is NaN.
  • If y is -0, the result is 1, even if x is NaN.
  • If x is NaN and y is nonzero, the result is NaN.
  • If abs(x)>1 and y is +∞, the result is +∞.
  • If abs(x)>1 and y is -∞, the result is +0.
  • If abs(x)==1 and y is +∞, the result is NaN.
  • If abs(x)==1 and y is -∞, the result is NaN.
  • If abs(x)<1 and y is +∞, the result is +0.
  • If abs(x)<1 and y is -∞, the result is +∞.
  • If x is +∞ and y>0, the result is +∞.
  • If x is +∞ and y<0, the result is +0.
  • If x is -∞ and y>0 and y is an odd integer, the result is -∞.
  • If x is -∞ and y>0 and y is not an odd integer, the result is +∞.
  • If x is -∞ and y<0 and y is an odd integer, the result is -0.
  • If x is -∞ and y<0 and y is not an odd integer, the result is +0.
  • If x is +0 and y>0, the result is +0.
  • If x is +0 and y<0, the result is +∞.
  • If x is -0 and y>0 and y is an odd integer, the result is -0.
  • If x is -0 and y>0 and y is not an odd integer, the result is +0.
  • If x is -0 and y<0 and y is an odd integer, the result is -∞.
  • If x is -0 and y<0 and y is not an odd integer, the result is +∞.
  • If X<0 and x is finite and y is finite and y is not an integer, the result is NaN.
Parameters:
x - a Number that will be raised to the power of y.
y - the power by which x will be raised.
Returns:
an approximation to the result of raising x to the power y.
random
static random() : Number
Returns a number value with positive sign, greater than or equal to 0 but less than 1, chosen randomly or pseudo randomly with approximately uniform distribution over that range, using an implementation-dependent algorithm or strategy.
Returns:
a Number greater than or equal to 0 but less than 1.
round
static round(x : Number) : Number
Returns the number value that is closest to x and is equal to a mathematical integer. If two integer number values are equally close to x, then the result is the number value that is closer to +∞. If x is already an integer, the result is x.
  • If x is NaN, the result is NaN.
  • If x is +0, the result is +0.
  • If x is -0, the result is -0.
  • If x is +∞, the result is +∞.
  • If x is -∞, the result is -∞.
  • If x is greater than 0 but less than 0.5, the result is +0.
  • If x is less than 0 but greater than or equal to -0.5, the result is -0.
Math.round(3.5) returns 4, but Math.round(-3.5) returns -3. The value of Math.round(x) is the same as the value of Math.floor(x+0.5), except when x is -0 or is less than 0 but greater than or equal to -0.5; for these cases Math.round(x) returns -0, but Math.floor(x+0.5) returns +0.
Parameters:
x - the Number to operate on.
Returns:
the number value that is closest to x and is equal to a mathematical integer.
sin
static sin(x : Number) : Number
Returns an approximation to the sine of x. The argument is expressed in radians.
  • If x is NaN, the result is NaN.
  • If x is +0, the result is +0.
  • If x is -0, the result is -0.
  • If x is +∞ or -∞, the result is NaN.
Parameters:
x - the Number to operate on.
Returns:
an approximation to the sine of x.
sqrt
static sqrt(x : Number) : Number
Returns an approximation to the square root of x.
  • If x is NaN, the result is NaN.
  • If x isless than 0, the result is NaN.
  • If x is +0, the result is +0.
  • If x is -0, the result is -0.
  • If x is +∞, the result is +∞.
Parameters:
x - the Number to operate on.
Returns:
an approximation to the square root of x.
tan
static tan(x : Number) : Number
Returns an approximation to the tangent of x. The argument is expressed in radians.
  • If x is NaN, the result is NaN.
  • If x is +0, the result is +0.
  • If x is -0, the result is -0.
  • If x is +∞ or -∞, the result is NaN.
Parameters:
x - the Number to operate on.
Returns:
an approximation to the tangent of x.
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