repl.txt (729B)
1 2 {{alias}}( x ) 3 Evaluates the natural logarithm of the factorial of `x`. 4 5 For input values other than negative integers, the function returns 6 7 ln( x! ) = ln( Γ(x+1) ) 8 9 where `Γ` is the Gamma function. For negative integers, the function returns 10 `NaN`. 11 12 If provided `NaN`, the function returns `NaN`. 13 14 Parameters 15 ---------- 16 x: number 17 Input value. 18 19 Returns 20 ------- 21 y: number 22 Natural logarithm of the factorial of `x`. 23 24 Examples 25 -------- 26 > var y = {{alias}}( 3.0 ) 27 ~1.792 28 > y = {{alias}}( 2.4 ) 29 ~1.092 30 > y = {{alias}}( -1.0 ) 31 NaN 32 > y = {{alias}}( -1.5 ) 33 ~1.266 34 > y = {{alias}}( NaN ) 35 NaN 36 37 See Also 38 -------- 39