Let us declare a variable b of type bool.
This type holds values of true and false.
int main() { bool b; }
This example declares a variable b of type bool.
The variable is not initialized, no value has been assigned to it at the time of construction.
To initialize a variable, we use an assignment operator = followed by an initializer:
int main() { bool b = true; }
We can also use braces {} for initialization:
int main() /*from ww w . ja v a 2 s . co m*/ { bool b{ true }; }
These examples declare a (local) variable b of type bool and initialize it to a value of true.
Our variable now holds a value of true.
All local variables should be initialized.
Accessing uninitialized variables results in Undefined Behavior.