Math
Written by: maffelu , 2009-04-16 17:54:06
The Basics
Math is a class with math routines to handle mathematics that goes beyond the normal +-/* operators. The mathclass is a sealed class and can't be instantiated and the classes and datamembers are static so you can't create a math object. What you do is that you use the math methods that comes with math.
These are the math methods:
| Method | Returns |
|---|---|
| Abs | Returns the absolute value of a number. |
| Ceiling | Returns a value that is the smallest whole number greater than or equal to a given number. |
| Exp | Returns E raised to a given power. This is the inverse of Log. |
| Floor | Returns a value that is the largest whole number that is less than or equal to the given number. |
| IEEERemainder | Returns the result of a division of two specified numbers. (This division operation conforms to the remainder operation stated within Section 5.1 of ANSI/IEEE Std. 754-1985; IEEE Standard for Binary Floating-Point Arithmetic; Institute of Electrical and Electronics Engineers, Inc; 1985.) |
| Log | Returns a value that is the logarithmic value of the given number. |
| Log10 | Returns a value that is the base 10 logarithm of a given value. |
| Max | Returns the larger of two values. |
| Min | Returns the smaller of two values. |
| Pow | Returns the value of a given value raised to a given power. |
| Round | Returns a rounded value for a number. You can specify the precision of the rounded number. The number .5 would be rounded down. |
| Sign | Returns a value indicating the sign of a value. 1 is returned for a negative number, 0 is returned for zero, and 1 is returned for a positive number. |
| Sqrt | Returns the square root for a given value. |
| Acos | Returns the value of an angle whose cosine is equal to a given number. |
| Asin | Returns the value of an angle whose sine is equal to a given number. |
| Atan | Returns the value of an angle whose tangent is equal to a given number. |
| Atan2 | Returns the value of an angle whose tangent is equal to the quotient of two given numbers. |
| Cos | Returns a value that is the cosine of a given angle. |
| Cosh | Returns a value that is the hyperbolic cosine for a given angle. |
| Sin | Returns the sine for a given angle. |
| Sinh | Returns the hyperbolic sine for a given angle. |
| Tan | Returns the tangent of a specified angle. |
| Tanh | Returns the hyperbolic tangent of a given angle. |
Two constants also comes with the math class, PI and E.PI.
PI returns the value of pi; 3.14159265358979323846.
E.PI returns the value of the logarithmic base; 2.7182818284590452354.
Advanced
Here are some examples of how to use the math class and it's methods:
Console.WriteLine("1. The square root of {0} is {1}.", 9, Math.Sqrt(9));
Console.WriteLine("2. The ceiling of {0} is {1}.", 9.4, Math.Ceiling(9.4));
Console.WriteLine("3. {0} raised to {1} is {2}.", 9.5, 3, Math.Pow(9.5,3));
Console.WriteLine("4. {0} rounded is {1}.", 10.7, Math.Round(10.7));
Console.Read();
This will look like this:
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Maffelu