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Printing Variables

Remember:  The basic output statement in Java is
                                  System.out.println ( );  

System.out.println(" text " ); will print what is between the double quotes and move the printing cursor to the next line.

System.out.print ( text ); will print what is between the double quotes and leave the printing cursor on the same line.

When dealing with variables:
                            System.out.println( The total pay is + totalPay);  
what is surrounded by " " is referred to as a "literal print" and gets printed exactly.  The "+" sign is the concatenator operator and concatenates the string with the value that is stored in the variable totalPay.    totalPay is declared as a double, but is automatically converted to a String for the purpose of printing out.
 

double totalPay = 1006.5;
System.out.println("The total pay is " + totalPay);
On the screen:
The total pay is 1006.5


You can print an arithmetic expression within a System.out.print statement.  Use parentheses around the arithmetic expression to avoid unexpected problems.
              System.out.println("Adding ten to the total: " + (totalPay + 10));

              System.out.println("answer " + 3 + 4);   // becomes answer 34
              System.out.println("answer " + (3 + 4));   // becomes answer 7

 


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