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# PlusTestAnswers - 13 is concatenated with that string The...

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Solution to Two Meanings of Plus Question 1, part (c) The first print statement: System.out.println ("8 plus 5 is " + 8 + 5); prints 8 plus 5 is 85 Because: There are no parentheses so evaluation is from left to right. The first plus has a string operand on the left so the operation is concatenation - the 8 is concatenated with the string and the result is a string. Now the second plus has a string on the left so it too is evaluated as concatenation - the 5 is concatenated with the string "8 plus 5 is 8" The second print statement: System.out.println ("8 plus 5 is " + (8 + 5)); prints 8 plus 5 is 13 Because: The expression 8 + 5 in parentheses is evaluated first and both operands are numeric so the numbers are added to get 13. Then the other + is concatenation since the operand on the left is a string - the
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Unformatted text preview: 13 is concatenated with that string. The third print statement: System.out.println (8 + 5 + " equals 8 plus 5."); prints 13 equals 8 plus 5. Because: The expression is evaluated left to right since there are no parentheses. The leftmost + has two numeric operands so they are added to get 13. Then the second + has one string operand so the 13 and that string are concatenated. Question 1, part (d): A space should be put inside the quotation marks after the word about and another one before the word years. Click here for a corrected version of the program. Question 2: An example program is in Birds.java...
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