Notice: This page requires JavaScript to function properly.
Please enable JavaScript in your browser settings or update your browser.Lernen Booleans | Conditional Statements
Introduction to C++

bookBooleans

Let’s discuss boolean (or logical) data type in more detail. The variable type of bool can take only two values - True (1) or False (0). The boolean can be used when we want to check some logical conditions in our code. For example, you want to know if the variable x is bigger than y to use this information by looking for the difference between them.

For this reason, there are some logical operators you can use in comparison:

Use them in boolean expressions, which return the output as a boolean value: True. If the condition holds or False otherwise.

For example:


              
12345

            
int x = 5;
int y = 4;
cout << (x > y) << endl; // will return true, because 5 is higher than 4
cout << (x <= 5) << endl; // will return true, because x is equal to 5
cout << ("hello" == "Hello"); // will return false, because these string aren't the equal
copy

The program returned 1 where the statement was true and 0 where was false.

question-icon

Check if the variable x is equal to the variable y and if x is greater than 450.

#include
using namespace std;

int main() {
    int x = 24 * 25;
    int y = 19 * 32;
    cout << (xy) << endl;
    cout << (x450);
    return 0;
}
0
1

War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 3. Kapitel 1

Fragen Sie AI

expand

Fragen Sie AI

ChatGPT

Fragen Sie alles oder probieren Sie eine der vorgeschlagenen Fragen, um unser Gespräch zu beginnen

Awesome!

Completion rate improved to 3.33

bookBooleans

Swipe um das Menü anzuzeigen

Let’s discuss boolean (or logical) data type in more detail. The variable type of bool can take only two values - True (1) or False (0). The boolean can be used when we want to check some logical conditions in our code. For example, you want to know if the variable x is bigger than y to use this information by looking for the difference between them.

For this reason, there are some logical operators you can use in comparison:

Use them in boolean expressions, which return the output as a boolean value: True. If the condition holds or False otherwise.

For example:


              
12345

            
int x = 5;
int y = 4;
cout << (x > y) << endl; // will return true, because 5 is higher than 4
cout << (x <= 5) << endl; // will return true, because x is equal to 5
cout << ("hello" == "Hello"); // will return false, because these string aren't the equal
copy

The program returned 1 where the statement was true and 0 where was false.

question-icon

Check if the variable x is equal to the variable y and if x is greater than 450.

#include
using namespace std;

int main() {
    int x = 24 * 25;
    int y = 19 * 32;
    cout << (xy) << endl;
    cout << (x450);
    return 0;
}
0
1

War alles klar?

Wie können wir es verbessern?

Danke für Ihr Feedback!

Abschnitt 3. Kapitel 1
some-alt