Classwork:
Built-In Exercises – Type conversions and more

For this assignment write a java program, BuiltIn1_YI.java to produce the code necessary to answer all the questions clearly.

1. 1. 1. In which way are the variables “x” and “a” alike in the following code snippet?

         int x;
         char a = 'z';
         System.out.println((int)a); 
         x = 't';
         System.out.println(x);
         

      2. Give an example for each of the following type conversions and include a comment to indicate how the conversion takes place.
         1. Explicit type conversion
         2. Automatic type conversion
         3. Explicit casts
         4. Automatic conversions for strings
      3. Write a line of code to divide a variable num of type double by zero. What is the output?
      4. What do each of the following print? Explain each outcome.
         1. System.out.println(2 + “bc”); prints: 2bc
         2. System.out.println(2 + 3 + “bc”); prints: 5bc
         3. System.out.println((2+3) + “bc”); prints: 5bc
         4. System.out.println(“bc” + (2+3)); prints: bc5
         5. System.out.println(“bc” + 2 + 3); prints: bc23
      5. Explain how to use Quadratic.java to find the square root of a number.
      6. What do each of the following print?
         1. System.out.println(‘b’);
         2. System.out.println(‘b’ + ‘c’);
         3. System.out.println((char) (‘a’ + 4));
      7. Suppose that a variable a is declared as int a = 2147483647 (or equivalently, Integer.MAX_VALUE). What do each of the following print? Explain each outcome.
         1. System.out.println(a);
         2. System.out.println(a + 1);
         3. System.out.println(2 – a);
         4. System.out.println(-2 – a);
         5. System.out.println(2 * a);
         6. System.out.println(4 * a);