Logical Operators Part 2

Part of the Fundamentals section of Coddy's JavaScript journey — lesson 19 of 77.

Logical operators have a special table called "Truth table" that shows what the combination of logical operators returns.

Truth table for the && operator:

The only way to get a true for the && operator is if both a and b are true

Truth table for the || operator:

In this case, to get a true result, either a or b should be true.

Truth table for the ! operator:

a	!a
false	true
true	false

Here the value of a is reversed. If a is false then !a is true

Challenge

Beginner

You are given a code, replace the question marks of the variables b1 and b2 so that b3 evaluates to true.

Note that b1 and b2 should hold numbers. (e.g. 3, 5, 11, …)

Cheat sheet

Truth tables show the results of logical operators:

AND operator (&&): Returns true only when both operands are true

OR operator (||): Returns true when at least one operand is true

NOT operator (!): Reverses the boolean value

a	!a
false	true
true	false

Try it yourself

// Type your code below
let b1 = ?
let b2 = ?
let b3 = !((b1 + b2) > (b1 * b2))

// Don't change the line below
console.log(`b3 = ${b3}`)

Test yourself

This lesson includes a short quiz. Start the lesson to answer it and track your progress.

1Introduction

4Operators Part 2

7Bill Split Calculator

10FizzBuzz with a Twist

13Grocery List Tracker