JavaScript Core Reference - Beginning JavaScript - page 674

Methods

Method introduced description

JavaScript 1.0 Returns the absolute (positive) value of a number.

abs(x)

JavaScript 1.0 Returns the arccosine of a number (in radians).

acos(x)

JavaScript 1.0 Returns the arcsine of a number (in radians).

asin(x)

JavaScript 1.0 Returns the arctangent of a number (in radians).

atan(x)

JavaScript 1.0 Returns the angle (in radians) between the x‐axis and the

position represented by the y and x coordinates passed in
as parameters.

atan2(y, x)

JavaScript 1.0 Returns the value of a number rounded up to the nearest

integer.

ceil(x)

JavaScript 1.0 Returns the cosine of a number.

cos(x)

JavaScript 1.0 Returns E to the power of the argument passed in.

exp(x)

JavaScript 1.0 Returns the value of a number rounded down to the

nearest integer.

floor(x)

JavaScript 1.0 Returns the natural logarithm (base E) of a number.

log(x)

JavaScript 1.0 Returns the greater of two numbers passed in as

parameters.

max(a, b)

JavaScript 1.0 Returns the lesser of two numbers passed in as parameters.

min(a, b)

JavaScript 1.0 Returns the first parameter raised to the power of the

second.

pow(x, y)

JavaScript 1.1 Returns a pseudo‐random number between 0 and 1.

random()

JavaScript 1.0 Returns the value of a number rounded up or down to the

nearest integer.

round(x)

JavaScript 1.0 Returns the sine of a number.

sin(x)

JavaScript 1.0 Returns the square root of a number.

sqrt(x)

JavaScript 1.0 Returns the tangent of a number.

tan(x)

number
The Number object acts as a wrapper for primitive numeric values. Introduced in JavaScript 1.1, a
Number object is created using the Number constructor with the initial value for the number passed
in as a parameter.