What's wrong in this program

Question

using System;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
mark = ConverToInt32(Console.ReadLine());

if (mark >= 50) {
Console.WriteLine("You passed.");
if (mark == 100) {
Console.WriteLine("Perfect!");
}
}
else {
Console.Writeline("you are fail");
}
}

Answer 1

I think you didn't declare the type of the "mark" variable, you should write "int" before "mark".

Answer 2

There are a couple of mistakes!

using System;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
/*here you did not declare the variable mark and mistook the writing of method Convert.ToInt32*/

int mark = Convert.ToInt32(Console.ReadLine());

if (mark >= 50) {
Console.WriteLine("You passed.");
if (mark == 100) {
Console.WriteLine("Perfect!");
}
}
else {
Console.Writeline("you are fail");
}
}
}
}
/*in the end you missed to close 2 curly braces, since you have 6 of { you need 6 of }*/

Answer 3

thank you