Logical Operators Part 2

Part of the Fundamentals section of Coddy's C++ journey — lesson 24 of 74.

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

Truth table for the and (&&) operator:

a	b	a && b
false	false	false
false	true	false
true	false	false
true	true	true

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

Truth table for the or (||) operator:

a	b	a \|\| b
false	false	false
false	true	true
true	false	true
true	true	true

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

Truth table for the not (!) 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 need to assign integer values to variables b1 and b2 so that b3 evaluates to true in the expression: bool b3 = !((b1 + b2) > (b1 * b2)).

Take a moment to analyze the condition and think about what values would make it true.

Cheat sheet

Truth tables show the results of logical operator combinations:

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

a	b	a && b
false	false	false
false	true	false
true	false	false
true	true	true

OR (||) operator: Returns true when either operand is true

a	b	a \|\| b
false	false	false
false	true	true
true	false	true
true	true	true

NOT (!) operator: Reverses the boolean value

a	!a
false	true
true	false

Try it yourself

#include <iostream>
using namespace std;

int main() {
    // Type your code below
    int b1 = ?;
    int b2 = ?;
    bool b3 = !((b1 + b2) > (b1 * b2));
    
    // Don't change the line below
    cout << "b3 = " << b3 << endl;
    
    return 0;
}