FAQ: Logical Operators - Logical Operator: &&

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This community-built FAQ covers the “Logical Operator: &&” exercise from the lesson “Logical Operators”.

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FAQs on the exercise Logical Operator: &&

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2

Why is hunger and anger "int"s, not "bool"s? Also, is there any reason why you would want to use “&&” instead of the more intuitive “and”? Same goes for “II” and “!” with regards to “or” and “not”.

4 Likes
3

Same question - why are hunger and anger designated as "int"s and not "bool"s in lines 5 & 6 of the code? Good question, @shampoomactavish!

6

This is a 5 months old question, should this be answered already because I’d also like to know that answer to this question as well.

7

Why is hunger and anger "int"s, not "bool"s?

Bool was introduced in c++ in 1998.Most people was no aware of it . Hence int were been used; before 1999 people use 0 as false and 1 as true .So the tradition was followed and it can also adjust with int. typing fatigue makes this thing easier for people.Sorry for my english.
Thank you.

#include
int main() {
int hunger = 1;

int anger = 1;

// Write the code below:

if (hunger && anger) {
std::cout<< “Hangry”;
}
}

3 Likes
8 
#include <iostream>

int main()
{
    int hunger = 1;

    int anger = 1;

    // Write the code below:

    if (hunger && anger)
    {
        std::cout << "Hangry";
    }
}

Missing include.

9

Yes, I missed it .
thank you.

10

hey everyone i didn’t get this if (hunger && anger) where is the condition is this mean hunger =1 and anger =1 ???

11

In C++, any expression that evaluates to 0 is equivalent to false, whereas all non-zero expressions are equivalent to true.

The following declarations and initialization were made before the if statement:

int hunger = true;
int anger = true;

So, hunger and anger will both be 1 and the condition
if (hunger && anger)
will evaluate to true.

1 Like
12

Maybe we’ll get to this in the future, but why does the main function seemed to be initialized as an integer?

13

Exercise explicitly told us to output “Hangry” but the solution needs to output “Hangry!”