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C# C# Basics (Retired) Perfect if / else if / else

Posted by Ammar Fatihallah
Ammar Fatihallah
7,417 Points

Getting a CS0019 error, don't know why.

Can anybody tell me why do I keep getting this error even though the temperature variable is set to int.

CodeChallenge.cs 
string input = Console.ReadLine();
int temperature = int.Parse(input);
if (temperature < 21) {
    Console.WriteLine("Too cold!");
}
else if (21 < temperature < 22) {
    Console.WriteLine("Just right.");
}
else if (temperature > 22) {
    Console.WriteLine("Too hot!");
}

2 Answers

Tizmiz Tizzer
Tizmiz Tizzer
1,040 Points

Try changing else if (21 < temperature < 22) to else if (temperature == 21 || temperature == 22)

This should work since you are comparing the two values (21 and 22) and making sure one or the other is == to temperature, and if they aren't you will move down to the next if else/else statement.

Ammar Fatihallah
Ammar Fatihallah
7,417 Points

Thank you! I kinda didn't understand it but then I twisted my mind and figured it out. I come from a python background so I hope you know why I did that lol.

Tizmiz Tizzer
Tizmiz Tizzer
1,040 Points

I started with python as my first language. I've made the same mistake before too, glad I could help!

Jon Wood
Jon Wood
9,884 Points
Jon Wood
Jon Wood
9,884 Points

In this if statement: else if (21 < temperature < 22)

You need to compare each value to the temperature variable and use the and (&&) operator on it, like this: else if (21 < temperature && temperature < 22)

Ammar Fatihallah
Ammar Fatihallah
7,417 Points

Thanks for your help. I tried to use the && operator but the challenge won't complete without some errors. So I tried the || operator and it passed. Thank you though for your help!

Jon Wood
Jon Wood
9,884 Points

Heh, my bad. I wasn't even thinking about the logic. I was just making sure I got that error fixed :p

Ammar Fatihallah
Ammar Fatihallah
7,417 Points

Haha no problem man, thanks for the help :)

Jon Wood
Jon Wood
9,884 Points

And I just learned something from you! I had no idea you could do that in Python. I'm learning that, myself. :)