adding a loop to a program

[ndruw]

I wrote this little program to convert celsius to fahrenheit and back in java (I'm teaching myself in my spare time, but I want to get it to restart (loop?) every time its done until someone types 'quit' into the reader. How would I do this?

// Name: Convert (Fahrenheit <-->
// Celsius)
// Description:Convert degrees Celsius
// to degrees Fahrenheit, and vice-versa.
// By: Andrew


import TerminalIO.KeyboardReader;


public class CelsFahr {
public static void main (String[]args)


{
KeyboardReader reader = new KeyboardReader();

int choice = reader.readInt("If you would like to convert from Fahrenheit to Celsius, enter 1. \n"
+ "For Celsius to Fahrenheit, enter 2. ");

if (choice == 1) {

double fahrenheit = reader.readDouble("Degrees fahrenheit: ");
double celsius = (fahrenheit - 32.0) * (5.0 / 9.0);
System.out.println(+ fahrenheit + " degrees Fahrenheit = " + celsius + " degrees Celcius.");
}


if (choice == 2) {

double celsius = reader.readDouble("Degrees Celsius: ");
double fahrenheit = ((9.0/5.0) * celsius) + 32;
System.out.println( celsius + " degrees Celsius = " + fahrenheit + " degrees Fahrenheit.");
}
}

}

 

[Empyrean]

Just use a while loop that is conditional on that input.

 

[LuminaryJanitor]

Getting it to recognise "quit" at any point will complicate things... For a start, you'd need to read all your inputs as strings, and then convert them to integers or doubles.

A much simpler way of doing it would be to add a prompt at the end, like "Again? (y/n)".
Or better yet, add it as an option in your selection prompt:

1. Fahrenheit -> Celsius
2. Farhenheit <- Celsius
3. Quit

Then, as mentioned above, put the whole method in a while loop, and have the loop condition change to false if 3 is entered.