////Nitrate problem
//using System;
//namespace ConsoleApp1
//{
//class Program
//static string Dose(double nitrate)
//if (nitrate > 10)
//return "3";
//}
//else
//if (nitrate > 2.5)
//return "2";
//if (nitrate > 1)
//return "1";
//return "0.5";
//static void Main(string[] args)
//double nitrate = 1.3;
//string result = Dose(nitrate);
//Console.WriteLine(result);
////Exam grade problem
//class program
//static string results(int marks)
//if (marks < 2)
//int numberRequired = 2 - marks;
//return "Your mark is equal to a grade U \n You were " + numberRequired + "marks away from a grade 1";
//else if (marks >= 2 && marks < 4)
//int numberRequired = 4 - marks;
//return "Your mark is equal to a grade 1 \n You were " + numberRequired + "marks away from a grade 2";
//else if (marks >= 4 && marks < 13)
//int numberRequired = 13 - marks;
//return "Your mark is equal to a grade 2 \n You were " + numberRequired + "marks away from a grade 3";
//else if (marks >= 13 && marks < 22)
//int numberRequired = 22 - marks;
//return "Your mark is equal to a grade 3 \n You were " + numberRequired + "marks away from a grade 4";
//else if (marks >= 22 && marks < 31)
//int numberRequired = 31 - marks;
//return "Your mark is equal to a grade 4 \n You were " + numberRequired + "marks away from a grade 5";
//else if (marks >= 31 && marks < 41)
//int numberRequired = 41 - marks;
//return "Your mark is equal to a grade 5 \n You were " + numberRequired + "marks away from a grade 6";
//else if (marks >= 41 && marks < 54)
//int numberRequired = 54 - marks;
//return "Your mark is equal to a grade 6 \n You were " + numberRequired + "marks away from a grade 7";
//else if (marks >= 54 && marks < 67)
//int numberRequired = 67 - marks;
//return "Your mark is equal to a grade 7 \n You were " + numberRequired + "marks away from a grade 8";
//else if (marks >= 67 && marks < 80)
//int numberRequired = 80 - marks;
//return "Your mark is equal to a grade 8 \n You were " + numberRequired + "marks away from a grade 9";
//return "Your mark is a grade 9";
//int marks = 65;
//string result = results(marks);
//Console.WriteLine(results(marks));
////Day format problem
//namespace Day_format
////subroutine
//static string DayFormat(int number, string parameter)
//if (parameter == "day")
//if (number == 1)
//return "Monday";
//else if (number == 2)
//return "Tuesday";
//else if (number == 3)
//return "Wednesday";
//else if (number == 4)
//return "Thursday";
//else if (number == 5)
//return "Friday";
//else if (number == 6)
//return "Saturday";
//else if (number == 7)
//return "Sunday";
//return "There is no day available";
//else if (parameter == "shortday")
//return "Mon";
//return "Tue";
//return "Wed";
//return "Thu";
//return "Fri";
//return "Sat";
//return "Sun";
//else if (parameter == "char")
//return "M";
//return "Tu";
//return "W";
//return "Th";
//return "F";
//return "Sa";
//return "Su";
//return "Error, no such parameter";
//string parameter = "char";
//int number = 5;
//Console.WriteLine(DayFormat(number, parameter));
