The methods of the System.Math class provide trigonometric, logarithmic, and other common mathematical functions.
Remarks
The following table lists methods of the System.Math class. You can use these in a Visual Basic program.
.NET Framework method |
Description |
|---|---|
Returns the absolute value of a number. |
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Returns the angle whose cosine is the specified number. |
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Returns the angle whose sine is the specified number. |
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Returns the angle whose tangent is the specified number. |
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Returns the angle whose tangent is the quotient of two specified numbers. |
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Returns the full product of two 32-bit numbers. |
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Returns the smallest integral value that's greater than or equal to the specified Decimal or Double. |
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Returns the cosine of the specified angle. |
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Returns the hyperbolic cosine of the specified angle. |
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Returns the quotient of two 32-bit or 64-bit signed integers, and also returns the remainder in an output parameter. |
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Returns e (the base of natural logarithms) raised to the specified power. |
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Returns the largest integer that's less than or equal to the specified Decimal or Double number. |
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Returns the remainder that results from the division of a specified number by another specified number. |
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Returns the natural (base e) logarithm of a specified number or the logarithm of a specified number in a specified base. |
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Returns the base 10 logarithm of a specified number. |
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Returns the larger of two numbers. |
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Returns the smaller of two numbers. |
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Returns a specified number raised to the specified power. |
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Returns a Decimal or Double value rounded to the nearest integral value or to a specified number of fractional digits. |
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Returns an Integer value indicating the sign of a number. |
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Returns the sine of the specified angle. |
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Returns the hyperbolic sine of the specified angle. |
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Returns the square root of a specified number. |
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Returns the tangent of the specified angle. |
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Returns the hyperbolic tangent of the specified angle. |
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Calculates the integral part of a specified Decimal or Double number. |
To use these functions without qualification, import the System.Math namespace into your project by adding the following code to the top of your source file:
Imports System.Math
Example
This example uses the Abs method of the Math class to compute the absolute value of a number.
' Returns 50.3.
Dim MyNumber1 As Double = Math.Abs(50.3)
' Returns 50.3.
Dim MyNumber2 As Double = Math.Abs(-50.3)
This example uses the Atan method of the Math class to calculate the value of pi.
Public Function GetPi() As Double
' Calculate the value of pi.
Return 4.0 * Math.Atan(1.0)
End Function
This example uses the Cos method of the Math class to return the cosine of an angle.
Public Function Sec(ByVal angle As Double) As Double
' Calculate the secant of angle, in radians.
Return 1.0 / Math.Cos(angle)
End Function
This example uses the Exp method of the Math class to return e raised to a power.
Public Function Sinh(ByVal angle As Double) As Double
' Calculate hyperbolic sine of an angle, in radians.
Return (Math.Exp(angle) - Math.Exp(-angle)) / 2.0
End Function
This example uses the Log method of the Math class to return the natural logarithm of a number.
Public Function Asinh(ByVal value As Double) As Double
' Calculate inverse hyperbolic sine, in radians.
Return Math.Log(value + Math.Sqrt(value * value + 1.0))
End Function
This example uses the Round method of the Math class to round a number to the nearest integer.
' Returns 3.
Dim MyVar2 As Double = Math.Round(2.8)
This example uses the Sign method of the Math class to determine the sign of a number.
' Returns 1.
Dim MySign1 As Integer = Math.Sign(12)
' Returns -1.
Dim MySign2 As Integer = Math.Sign(-2.4)
' Returns 0.
Dim MySign3 As Integer = Math.Sign(0)
This example uses the Sin method of the Math class to return the sine of an angle.
Public Function Csc(ByVal angle As Double) As Double
' Calculate cosecant of an angle, in radians.
Return 1.0 / Math.Sin(angle)
End Function
This example uses the Sqrt method of the Math class to calculate the square root of a number.
' Returns 2.
Dim MySqr1 As Double = Math.Sqrt(4)
' Returns 4.79583152331272.
Dim MySqr2 As Double = Math.Sqrt(23)
' Returns 0.
Dim MySqr3 As Double = Math.Sqrt(0)
' Returns NaN (not a number).
Dim MySqr4 As Double = Math.Sqrt(-4)
This example uses the Tan method of the Math class to return the tangent of an angle.
Public Function Ctan(ByVal angle As Double) As Double
' Calculate cotangent of an angle, in radians.
Return 1.0 / Math.Tan(angle)
End Function
Requirements
Class:Math
Namespace:System
Assembly: mscorlib (in mscorlib.dll)
See Also
Reference
Arithmetic Operators (Visual Basic)