Unhandled exception. System.FormatException: Input string was not in a correct format [duplicate]-CodePudding

using System;

namespace L2._7_BodyMassIndex { class Program { static void Main(string[] args) { Console.WriteLine("Body Mass Index Calculator."); // All your code here Console.WriteLine("Enter Your Name"); string userName = Console.ReadLine();

        Console.WriteLine("Enter Your Weight In kg");
        double userWeight = int.Parse(Console.ReadLine());

        Console.WriteLine("Enter Your Height In Meters");
        double userHeight = int.Parse(Console.ReadLine());

        double userHeightSqrd = Math.Pow(userHeight,2);
        double userBmi = (userWeight / userHeightSqrd);

        Console.WriteLine("============");
        Console.WriteLine(userName);
        Console.WriteLine("============");
        Console.WriteLine("Weight: "   userWeight);
        Console.WriteLine("Height: "   userHeight);
        Console.WriteLine("BMI: "   userBmi);

        
    }
}

}

Getting unhandled exception errors when program is displaying end of the program.

"Unhandled exception. System.FormatException: Input string was not in a correct format. at System.Number.ThrowOverflowOrFormatException(ParsingStatus status, TypeCode type) at System.Number.ParseInt32(ReadOnlySpan`1 value, NumberStyles styles, NumberFormatInfo info) at System.Int32.Parse(String s)"

CodePudding user response：

Use same datatype for conversion and use the double.TryParse() instead of int.Parse() to prevent exceptions.

Console.WriteLine("Enter Your Weight In kg");
double userWeight;
double.TryParse(Console.ReadLine(), out userWeight);

Console.WriteLine("Enter Your Height In Meters");
double userHeight;
double.TryParse(Console.ReadLine(), out userHeight);

CodePudding user response：

Try to match the type of your input and the type of your variables like:

 double userWeight = double.Parse(Console.ReadLine());
 double userHeight = double.Parse(Console.ReadLine());