◆ Dconst()

Function Dconst ( I As Long )

基本定数

目的: Dconstは基本定数を返す.

戻り値: Double
Iにより指定された値. (Iが正しくない場合, 0を返す.)

引数

[in] I 本ルーチンが返す値を指定.
= 1: √2
= 2: √3
= 3: √5
= 4: √10
= 5: 2 の立方根
= 6: 3 の立方根
= 7: 2 の4乗根
= 8: ln 2
= 9: ln 3
= 10: ln 10
= 11: 1/ln 2
= 12: 1/ln 10
= 13: π
= 14: 1° = π/180
= 15: 1/π
= 16: π^2
= 17: √π = Γ(1/2)
= 18: Γ(1/3)
= 19: Γ(2/3)
= 20: e
= 21: 1/e
= 22: e^2
= 23: γ (Euler定数)
= 24: ln π
= 25: φ (黄金比)
= 26: exp(γ)
= 27: exp(π/4)
= 28: sin 1
= 29: cos 1
= 30: -ζ'(2)
= 31: ζ(3)
= 32: ln φ
= 33: 1/ln φ
= 34: -ln ln 2

出典: D. E. Knuth, “The Art of Computer Programming Third Edition, Vol.1 / Fundamental Algorithms”, Addison Wesley Longman (1997)