• Topics: Loops, using the counter variable

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

The 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