with javascript_semantics
constant inf = 1e300*1e300, -- (works on both 32 and 64 bit)
         ninf = -inf,
         nan = -(inf/inf),
         nzero = -1/inf     -- (not supported)

printf(1," inf: %f\n",{inf})
printf(1," ninf: %f\n",{ninf})
printf(1," nan: %f\n",{nan})
printf(1,"*nzero: %f\n",{nzero})
printf(1," inf+2: %f\n",{inf+2})
printf(1," inf+ninf: %f\n",{inf+ninf})
printf(1," 0*inf: %f\n",{0*inf})
printf(1," nan+1: %f\n",{nan+1})
printf(1," nan+nan: %f\n",{nan+nan})
printf(1," inf>1e300: %d\n",{inf>1e300})
printf(1," ninf<1e300: %d\n",{ninf<-1e300})
printf(1,"*nan=nan: %d\n",{nan=nan})
printf(1," nan=42: %d\n",{nan=42})
printf(1,"*nan<0: %d\n",{nan<0})
printf(1," nan>0: %d\n",{nan>0})