getDiscountPercentage static method

String getDiscountPercentage(
  1. dynamic discount
)

Implementation

static String getDiscountPercentage(dynamic discount){
  double perc  = double.tryParse(discount.toString()) ?? 0;
  if((perc.isNegative) || (perc == 0)){
      return 'N/A';
    }
    else{
      return perc.text;
    }
}