Joe Chung
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====== TempConvert - Temperature conversion tables ======

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  * Topics: Loops, using the counter variable

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Write ''TempConvert.java'' to output two temperature conversion tables.

  * The first table that is output will show temperatures in the range 0 - 212 degrees Fahrenheit and the equivalent temperatures in Celsius.
    * Increase Fahrenheit values in increments of two, i.e., 0, 2, 4, 6, ..., 212
    * Use a //for// loop.
      * Use a //for// loop counter variable //tempF// (instead of //i//) to represent temperature in Fahrenheit.
        * //tempF// will be used in the loop to calculate //tempC//, the equivalent Celsius temperature.

  * The second table that is output will show temperatures in the range 0 - 100 degrees Celsius and the equivalent temperatures in  Fahrenheit.
    * Increase Celsius values in increments of two, i.e., 0, 2, 4, 6, ..., 100
    * Use a second //for// loop.
      * The //for// loop counter variable used here will be called //tempC// to represent temperature in Celsius.
        * //tempC// will be used in the loop to calculate //tempF//, the equivalent Fahrenheit temperature.

  * Two formulas will be needed:
    * Fahrenheit to Celsius: (°F - 32) / 1.8 = °C
    * Celsius to Fahrenheit: °C × 1.8 + 32 = °F


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The code:

<code>
// TempConvert.java
// F-to-C and C-to-F conversion tables;
// Uses two for loops

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

      // F-to-C table:
      // Print table headings.
      // The \t (tab) characters help to set consistent columns
      // in the output.
      System.out.println("Fahrenheit" + "\t\t\t" + "Celsius");

      // Print table values using a for loop.
      for ( int tempF = 0; tempF <= 212; tempF=tempF+2 ) {
         double tempC = (tempF - 32) / 1.8;
         System.out.println(tempF + "\t\t\t\t" + tempC);
      } // end for


      // Want an extra line between the tables
      System.out.println();


      // C-to-F table:
      // Print table headings.
      System.out.println("Celsius" + "\t\t\t\t" + "Fahrenheit");

      // Print table values using a for loop.
      for ( int tempC = 0; tempC <= 100; tempC=tempC+2 ) {
         double tempF = (tempC * 1.8) + 32;
         System.out.println(tempC + "\t\t\t\t" + tempF);
      } // end for
       
      
   } // end main
} // end class
</code>
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