Adding a plus sign to positive values java

Question

How to make that before plus Celsius values, was output plus sign, cons are automatically add to minus value. This is methods which calculate the value. Or maybe i need to use some output modification?

            public static double CtoF(double Celsius) {            
                System.out.println("Celsius |   Fahrenheit");
                System.out.println("");
                for (int i = 0; i <= 50; i++) {
                    Celsius = (Celsius*9/5)+32;
                    System.out.printf("%3d     |    ", i);
                    System.out.println((int) Celsius);
                }
                return Celsius;
            }

            public static double FtoC(double Fahrenheit) {            
                System.out.println("Fahrenheit |   Celsius");
                System.out.println("");
                for (int i = 0; i <= 50; i++) {
                    Fahrenheit = (Fahrenheit-32)*5/9;
                    System.out.printf("%3d       |    ", i);
                    System.out.println((int) Fahrenheit);
                }
                return Fahrenheit;
            }

Output of values:

Celsius |   Fahrenheit

  0     |    32
  1     |    89
  2     |    193
  3     |    379
  4     |    715
  5     |    1320
  6     |    2408
  7     |    4367
  8     |    7894
  9     |    14241
 10     |    25667

Fahrenheit |   Celsius

  0       |    -17
  1       |    -27
  2       |    -33
  3       |    -36
  4       |    -37
  5       |    -38
  6       |    -39
  7       |    -39
  8       |    -39
  9       |    -39
 10       |    -39

UPD: Here is answer: Format a number with leading sign

look at [enter link description here][1]https://stackoverflow.com/questions/5243316/format-a-number-with-leading-sign — Alexey K, Oct 25 '17 at 16:36

score -2 · Accepted Answer · answered Oct 25 '17 at 16:38

You could get away with just a ternary operator inside of your printf statements.

System.out.printf( (Celsius > 0 ? "+" : "") + "%3d       |    ", i);
System.out.printf( (Farenheit > 0 ? "+" : "") + "%3d       |    ", i);

Here's a link: https://en.wikipedia.org/wiki/%3F:#Java

Adding a plus sign to positive values java

1 Answers1