// Float64Must : Must Conver "val" to Float64
Float64Must : Must Conver "val" to Float64
// Float64Must : Must Conver " val " to Float64
func Float64Must(val interface{}, def ...float64) float64 {
	ret, err := Float64(val)
	if err != nil && len(def) > 0 {
		return def[0]
	}
	return ret
}
func Float64Must ( val interface { } , def ... float64 ) float64 { ret , err := Float64 ( val ) if err != nil && len ( def ) > 0 { return def [ 0 ] } return ret }
Float64Must : Must Conver "val" to Float64
Float64Must : Must Conver " val " to Float64