Mathクラス
Math クラスは、主な数学関数・定数を提供するクラスです。
クラスの機能
プロパティ
E
Static Function E() As Double
ネイピア数（自然対数の底）を返します。
PI
Static Function PI() As Double
円周率を返します。
メソッド
Abs
Static Function Abs(x As Double) As Double Static Function Abs(x As Single) As Single Static Function Abs(x As Char) As Char Static Function Abs(x As Integer) As Integer Static Function Abs(x As Long) As Long Static Function Abs(x As Int64) As Int64
xの絶対値を返します。絶対値を表現できない値が与えられた場合の挙動は未定義です。
Sin
Static Function Sin(x As Double) As Double
xの正弦を返します。xはラジアン単位です。
Cos
Static Function Cos(x As Double) As Double
xの余弦を返します。xはラジアン単位です。
Tan
Static Function Tan(x As Double) As Double
xの正接を返します。xはラジアン単位です。
Sinh
Static Function Sinh(x As Double) As Double
xの双曲線正弦を返します。xはラジアン単位です。
Cosh
Static Function Cosh(x As Double) As Double
xの双曲線余弦を返します。xはラジアン単位です。
Tanh
Static Function Tanh(x As Double) As Double
xの双曲線正接を返します。xはラジアン単位です。
Asin
Static Function Asin(x As Double) As Double
xの逆正弦の主値をラジアン単位で返します。
Acos
Static Function Acos(x As Double) As Double
xの逆余弦の主値をラジアン単位で返します。
Atan
Static Function Atan(x As Double) As Double
xの逆正接の主値をラジアン単位で返します。
Atan2
Static Function Atan(y As Double, x As Double) As Double
y / xの逆正接の主値をラジアン単位で返します。引数の符号によって戻り値の符号が決まります。原点(0, 0)と(x, y)とがなす角度を求めると見ることができます。
Exp
Static Function Exp(x As Double) As Double
eのx乗を返します。
Log
Static Function Log(x As Double) As Double
xの自然対数を返します。
Log10
Static Function Log10(x As Double) As Double
xの常用対数を返します。
Pow
Static Function Pow(x As Double, y As Double) As Double
x ^ yを返します。
Sqrt
Static Function Sqrt(x As Double) As Double
実数の範囲で、xの平方根のうち正の数となるものを返します。
Ceiling
Static Function Ceiling(x As Double) As Double
xの小数点以下を切り上げた数を返します。注意：現在の実装では戻り値の型はLongです。
Floor
Static Function Floor(x As Double) As Double
xの小数点以下を切り捨てた数を返します。注意：現在の実装では戻り値の型はLongです。
Round
Static Function Round(x As Double) As Double Static Function Round(x As Double, digits As Long) As Double Static Function Round(x As Double, mode As MidpointRounding) As Double Static Function Round(x As Double, digits As Long, mode As MidpointRounding) As Double
xの小数点以下digitsで指定された桁より下を丸めた数を返します。digitsが指定されていない場合は0と見做されます。xが中間値のときの扱いは、modeによって指定できます。省略するとMidpointRounding.ToEvenが指定されたものと見做されます。注意：現在xのみを引数に取るもの以外は実装されていません。参照: MidpointRounding列挙体
Truncate
Static Function Truncate(x As Double) As Double
xの整数部を返します。注意：現在の実装では戻り値の型はLongです。
IEEERemainder
Static Function IEEERemainder(x As Double, y As Double) As Double
x / yの余りを返します。IEEE 754-1985 §5.1で規定されている剰余演算に準拠した結果を返します。
BigMul
Static Function BigMul(x As Long, y As Long) As Int64
xとyの積を求めますが、結果を64ビット整数で返します。
DivRem
Static Function DivRem(x As Long, y As Long, ByRef ret As Long) As Long Static Function DivRem(x As Int64, y As Int64, ByRef ret As Int64) As Int64
x / yを返します。retにはその余りを返します。
Max
Static Function Max(x As Byte, y As Byte) As Byte Static Function Max(x As Char, y As Char) As Char Static Function Max(x As Word, y As Word) As Word Static Function Max(x As Integer, y As Integer) As Integer Static Function Max(x As DWord, y As DWord) As DWord Static Function Max(x As Long, y As Long) As Long Static Function Max(x As QWord, y As QWord) As QWord Static Function Max(x As Int64, y As Int64) As Int64 Static Function Max(x As Single, y As Single) As Single Static Function Max(x As Double, y As Double) As Double
xとyのうち大きいほうを返します。
Min
Static Function Min(x As Byte, y As Byte) As Byte Static Function Min(x As Char, y As Char) As Char Static Function Min(x As Word, y As Word) As Word Static Function Min(x As Integer, y As Integer) As Integer Static Function Min(x As DWord, y As DWord) As DWord Static Function Min(x As Long, y As Long) As Long Static Function Min(x As QWord, y As QWord) As QWord Static Function Min(x As Int64, y As Int64) As Int64 Static Function Min(x As Single, y As Single) As Single Static Function Min(x As Double, y As Double) As Double
xとyのうち小さいほうを返します。
Sign
Static Function Sign(value As Char) As Long Static Function Sign(value As Integer) As Long Static Function Sign(value As Long) As Long Static Function Sign(value As Int64) As Long Static Function Sign(value As Single) As Long Static Function Sign(value As Double) As Long
xが0を超えていれば1、0に等しければ0、0未満なら-1を返します。
