Java Increment & Decrement Operators

++ increases the value of a variable by 1

• assignment operator

• decrement operator

• increment operator

• sentinel

--; decreases the value of a variable by 1

• assignment operator

• decrement operator

• increment operator

• sentinel

PRE-increment us used when you want to use the incremented

value of the variable in that expression. Whereas POST-increment uses the original value before incrementing it

• True

• False

What would the new value of A be?

A=1;

a++;

• 1

• 2

• 3

• 4

What would the new value of A be?

A=1;

A--;

• 0

• 1

• 2

• -1

What's the value of below?

int i=5;

System.out.println(i++);

System.out.println(i);

System.out.println(++i);

• 5

  6

  7

• 6

  6

  7

• 6

  7

  8

• 5

  5

  6

++i and i++ cannot be used anywhere for the same purpose

• true

• false

What does the following code output?

int x = 1;

System.out.println(x++);

• 1

• 2

• compilation error

• runtime error

Which statement(s) are equivalent to i = i + 1?

• i += 1

• i++

• i -= 1

• i--

Which of the sets of statements below will add 1 to x if x is positive and subtract 1 from x if x is negative but leave x alone if x is 0?

• if (x > 0)  x++;
  else x--;
  
• if (x > 0) x++;
  else if (x < 0) x--;
  
• if (x > 0) x++;
  if (x < 0) x--;
  else x = 0;
  
• if (x == 0) x = 0;
  else x++;
  x--;