Skip to main content

Subgoals

Section 5.4 Selection-WE2-P1

Subgoals for Evaluating Selection Statements.

  1. Diagram which statements go together
    🔗
    🔗
  2. For if statement, determine whether expression is true or false
    🔗
    🔗
  3. If true – follow true branch, if false – follow else branch or do nothing if no else branch
    🔗
    🔗
🔗

Subsection 5.4.1

Exercises Exercises

1.
Q6: What is the output of the following code?
🔗
if (false)
   System.out.println("it is true");
else
   System.out.println("it is false");
  • it is true
    🔗
  • it is false
    🔗
  • There is no output because a compiler error occurs
    🔗
  • There is no output because an exception occurs
    🔗
🔗
2.
Q7: What is the output of the following code?
🔗
if (12 < 12)
   System.out.println("Never");
else
   System.out.println("Always");
  • Never
    🔗
  • Always
    🔗
  • There is no output because a compiler error occurs
    🔗
  • There is no output because an exception occurs
    🔗
🔗
3.
Q8: What is the output of the following code?
🔗
double var1 = 15.0;
double var2 = 25.12;
if ((2 * var1) >= var2)
   System.out.println("O.K.");
else
   System.out.println("Not O.K.");
  • O.K.
    🔗
  • Not O.K.
    🔗
  • There is no output because a compiler error occurs
    🔗
  • There is no output because an exception occurs
    🔗
🔗
4.
Q9: What is the output of the following code?
🔗
int x = 0;
if (x = 0)  /* look closely! */
   System.out.println("0 is true");
else
   System.out.println("0 is false");
  • 0 is true
    🔗
  • 0 is false
    🔗
  • There is no output because a compiler error occurs
    🔗
  • There is no output because an exception occurs
    🔗
🔗
🔗
🔗
You have attempted 1 of 3 activities on this page.
🔗
PrevTopNext