Problem Set: Logic

This section contains a number of selected problems for the Logic section.

It is recommended that you review the problems, and complete a few before moving on to the next section.

Problem #1: This or That

Identify the output of the following snippet when ||variables:bool|| is

  • ||logic:true||
  • ||logic:false||
if (bool) {
} else {

Problem #2: Boolean logic

Determine whether the following expressions evaluate to ||logic:true|| or ||logic:false||.

Problem Expression Result
(a) true || false
(b) true || true
(c) false && true
(d) false && false
(e) true && !true
(f) !false || !true
(g) !false || true  

Problem #3: Mysterious Logging

Fill in the table below for the output of the following code based on the initial values of ||variables:bool1|| and ||variables:bool2||. If multiple values are logged, use a slash / to separate the different lines. The case where ||variables:bool1|| and ||variables:bool2|| are both ||logic:true|| is filled in as an example.

bool1 == true bool1 == false
bool2 == true 2 / 3
bool2 == false  
if (bool1 && 10 > 4) {
    if (!bool2) {
    } else {
} else {
    if (6 > 8) {
    } else {

Problem #4: Rain or Shine

Translate the following statements into a program that ||game:splashes|| a clothing choice. Use a number variable ||variables:temp|| for the temperature and a boolean variable ||variables:isRaining|| for whether or not it is raining.

If the temperature is less than 30 degrees, then I wear my winter coat. Otherwise, if it is raining, I wear my rain jacket. In all other cases, I’ll just wear a sweatshirt.

Problem #5: Implication

Create a boolean expression that generates the following results given boolean variables ||variables:a|| and ||variables:b||.

a b Result
true true true
true false false
false true true
false false true