| module Math |
Index:
atan2 cos exp frexp ldexp log log10 sin sqrt tan
The Math module contains module functions for basic trigonometric and transcendental functions.
| constants |
E |
2.718281828 | Value of e (base of natural logarithms) |
PI |
3.141592654 | Value of PI |
| class methods | |
| atan2 | Math.atan2( y, x ) -> aFloat | Computes the arc tangent given y and x. Returns -PI..PI. |
| cos | Math.cos( aNumeric ) -> aFloat | Computes the cosine of aNumeric (expressed in radians). Returns -1..1. |
| exp | Math.exp( aNumeric ) -> aFloat | Returns e raised to the power of aNumeric. |
| frexp | Math.frexp( aNumeric ) -> anArray | Returns a two-element array ([aFloat, aFixnum]) containing the normalized fraction and exponent of aNumeric. |
| ldexp | Math.ldexp( aFloat, anInteger ) -> aFloat | Returns the value of aFloat * 2anInteger. |
| log | Math.log( aNumeric ) -> aFloat | Returns the natural logarithm of aNumeric. |
| log10 | Math.log10( aNumeric ) -> aFloat | Returns the base 10 logarithm of aNumeric. |
| sin | Math.sin( aNumeric ) -> aFloat | Computes the sine of aNumeric (expressed in radians). Returns -1..1. |
| sqrt | Math.sqrt( aNumeric ) -> aFloat |
Returns the non-negative square root of aNumeric.
Raises ArgError if aNumeric is less than zero.
|
| tan | Math.tan( aNumeric ) -> aFloat | Returns the tangent of aNumeric (expressed in radians). |
Extracted from the book "Programming Ruby - The Pragmatic Programmer's Guide"
Copyright © 2000 Addison Wesley Longman, Inc. Released under the terms of the Open Publication License V1.0.
This reference is available for download.