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

Posted by William Bukowski
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William Bukowski
Android Development Techdegree Student 549 Points

Cannot use "==" operator to compared a string or int, in statement if(input==21) do something, where input is an int

In a code challenge, I try to use an if statement to compare the variable "input" to an integer. The compiler claims there is no way "==" can be used to compare "input" to to an integer, while I have used this very method in past code challenges.

Please help.

CodeChallenge.cs 
string input = Console.ReadLine();
int temperature = int.Parse(input);

if(input==21)   
    { 
        Console.WriteLine("Just right.");
    }

2 Answers

Matthew Tran
Matthew Tran
16,343 Points
Matthew Tran
Matthew Tran
16,343 Points

In your code here, the input is still a string. You converted the input from a string to an integer and stored it into the temperature variable correctly. But then you used the input variable in your if statement instead of your newly converted temperature variable with the integer in it.

Also, this challenge tells you to say Just Right if its between two temperatures, 21 and 22, so you should be using the greater than and the less than operator at the same time.

Steven Parker
Steven Parker
231,248 Points
Steven Parker
Steven Parker
231,248 Points

You'll need a few more tests and output statements.

Matthew's right about testing temperature instead of input, but you also need to add a few more tests and output statements. Your program should output one of three possible responses based on the value entered, so you need a bit more code yet.

Hint: This might be a good place for an "if...else if...else" chain.