❔ I need your help with this project BMI & BMR

1. BMI
First, the program must calculate the BMI-Body Mass Index. BMI is a measure of the ratio between weight and height.
This measurement is used, among other things, by the WHO (World Health Organization) to define overweight/obesity and should be seen as a guideline.
The formula for calculating BMI is as follows:

BMI = 1.3*weight(kg)/height(m)2.5

The program should print whether the person has a normal weight or not according to the following table.

BMI table
The table below applies to men and women over 18 years of age with a normal build.

BMI under 18.5 underweight
BMI 18.5–25 healthy and normal weight
BMI 25–30 overweight
BMI 30–40 severely overweight
BMI over 40 extreme obesity

1. BMI
First, the program must calculate the BMI-Body Mass Index. BMI is a measure of the ratio between weight and height.
This measurement is used, among other things, by the WHO (World Health Organization) to define overweight/obesity and should be seen as a guideline.
The formula for calculating BMI is as follows:

BMI = 1.3*weight(kg)/height(m)2.5

The program should print whether the person has a normal weight or not according to the following table.

BMI table
The table below applies to men and women over 18 years of age with a normal build.

BMI under 18.5 underweight
BMI 18.5–25 healthy and normal weight
BMI 25–30 overweight
BMI 30–40 severely overweight
BMI over 40 extreme obesity

The program will then calculate the BMR-basal metabolic rate. BMR is the daily energy requirement needed to maintain
a person's vital organs at total rest.

One of the formulas that can be used to calculate this is the Mifflin-st Jeor equation:

Men:

BMR (men) = 66.47 + (13.75 × weight in kg) + (5.003 × height in cm) − (6.755 × age in years)

Women:

BMR (women) = 655.1 + (9.563 × weight in kg) + (1.85 × height in cm) − (4.676 × age in years)

Your program should prompt the user to enter their gender, height and weight, and age.

The program must verify that entered values are valid.
50 [cm] ≤ length ≤ 220 [cm] // user's height
10 [kg] ≤ weight ≤ 250 [kg] // user's weight
18 [years] ≤ age ≤ 70 [years] // user's age
The program should then print both bmi and bmr.

The program will then calculate the BMR-basal metabolic rate. BMR is the daily energy requirement needed to maintain
a person's vital organs at total rest.

One of the formulas that can be used to calculate this is the Mifflin-st Jeor equation:

Men:

BMR (men) = 66.47 + (13.75 × weight in kg) + (5.003 × height in cm) − (6.755 × age in years)

Women:

BMR (women) = 655.1 + (9.563 × weight in kg) + (1.85 × height in cm) − (4.676 × age in years)

Your program should prompt the user to enter their gender, height and weight, and age.

The program must verify that entered values are valid.
50 [cm] ≤ length ≤ 220 [cm] // user's height
10 [kg] ≤ weight ≤ 250 [kg] // user's weight
18 [years] ≤ age ≤ 70 [years] // user's age
The program should then print both bmi and bmr.

Console.WriteLine("BMI or BMR?");
var input = Console.ReadLine().ToUpper();
if (input == "BMI")
  RunBmi();
else if (input == "BMR");
  RunBmr();
else
  Console.WriteLine("What?");

Console.WriteLine("BMI or BMR?");
var input = Console.ReadLine().ToUpper();
if (input == "BMI")
  RunBmi();
else if (input == "BMR");
  RunBmr();
else
  Console.WriteLine("What?");

public static void RunBmi()
        {

        }
        public static void RunBmr()
        {

        }

public static void RunBmi()
        {

        }
        public static void RunBmr()
        {

        }

return Convert.ToInt32(null); //returns 0. null should not be considered as 0 ever
return Convert.ToInt32("asdf"); //throws FormatException

return Convert.ToInt32(null); //returns 0. null should not be considered as 0 ever
return Convert.ToInt32("asdf"); //throws FormatException

var number = int.Parse("abc"); //throws FormatException
var number = int.Parse(""); //throws FormatException

var number = int.Parse("abc"); //throws FormatException
var number = int.Parse(""); //throws FormatException

if (int.TryParse(someInput, out var result))
{
  Console.WriteLine($"Thanks for giving me the following number: {result}!");
}
else
{
  Console.WriteLine("You didn't give me a valid number :c");
}

if (int.TryParse(someInput, out var result))
{
  Console.WriteLine($"Thanks for giving me the following number: {result}!");
}
else
{
  Console.WriteLine("You didn't give me a valid number :c");
}