sgn

Returns -1 if x < 0, x if x == 0, 1 if x > 0, and NaN if x==NaN.

@safe pure nothrow @nogc

sgn

(

)

(

F x

)

if (

)

Examples

assert(sgn(168.1234) == 1);
assert(sgn(-168.1234) == -1);
assert(sgn(0.0) == 0);
assert(sgn(-0.0) == 0);