Unterminated double quote string

[paramjit]

I am a beginner Rustacean. I am getting aforementioned error. But unable to find the error in code. The error screen shot:

The code is:

use std::io;
fn main() {
    loop {
        println!("1: Convert temperature from Fahrenheit to Celsius.");
        println!("2: Convert temperature from Celsius to Fahrenheit.");
        println!("3: Quit"); 
        println!("Enter your choice (1, 2, 3);
        let mut choice = String::new();
        io::stdin()
            .read_line(&mut choice)
            .expect("Failed to read line");
        let choice: u32 = choice.trim().parse().expect("Invalid Input");
        if choice == 1 {
            println!("Enter temperature in Fahrenheit:");
            let mut fahrenheit = String::new();
            io::stdin()
                .read_line(&mut fahrenheit)
                .expect("Failed to read line");
            let fahrenheit: f32 = fahrenheit.trim().parse().expect("Invalid Input");
            let result: f32 = (fahrenheit - 32 as f32) / 1.8;
            println!("Temperature in Celsius {}",result );
        }
        if choice == 2 {
            println!("Enter temperature in Celsius:");
            let mut celsius = String::new();
            io::stdin()
                .read_line(&mut celsius)
                .expect("Failed to read line");
            let celsius: f32 = celsius.trim().parse().expect("Invalid Input");
            let result: f32 = (celsius * 1.8)+(32 as f32);
            println!("Temperature in Fahrenheit {}",result );

        }
        if choice == 3{
            break; 
        }
    }
}

I can't see any error in the code. Please help me out. Thanks in advance

[Nemo157]

println!("Enter your choice (1, 2, 3);

You're missing the closing quote here.

I can highly recommend using an editor with syntax highlighting such as VS Code, this can make it very obvious where the error is for syntax errors like this.

[paramjit]

I am focused on line 31 as directed by the compiler. The compiler should have pointed to correct line no. The correct line no. is 7. Is this a bug in compiler.
Thank you for the resolution

[mbrubeck]

The code on line 7 appears to be valid code to the compiler, because it doesn't know that "let mut choice..." on line 8 was meant to be a new line of code. It looks like a valid multi-line string literal, for example:

let poem = "Roses are red,
            violets are blue.";

[Cerber-Ursi]

By the way, even simply dropping your code into playground would help you here, since it also has syntax highlighting, and the problem would be easily seen.

[paramjit]

Yes, it could have helped. Compiler could have also helped if it points to the starting point. But it pointed towards the end.

[Cerber-Ursi]

And how would you check if the starting point is an error? Although I think it could throw an error on the .expect("Failed to read line"); line, since Failed is not a known token at this place. But I can't think of any way to detect that the problem is several lines before.

[paramjit]

You may be right. I don't have knowledge of compilers. Thanks