C++: What is Boolean Data Type & What Does it Do?

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In summary, Boolean refers to a data type that can have only two values, true or false. It is commonly used to represent conditions that can only have these two outcomes, such as in a looping construct or other conditions in a program.
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Boolean refers to a quantity that has only two possible values, true or false.

The language has the built-in data type bool for representing Boolean quantities.

thats what my book says. i don't really understand the purpose. here's a passage from my book:
Code: 
int main() {
   bool isLarge = false;
   bool isNeg   = false;
   int  userNum = 0;

what is bool for? what does it do?
 
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One example would be as use for a flag that indicates when a looping construct should quit. Really though, any condition in your program that will only be either true or false is a good candidate for this data type.
 

FAQ: C++: What is Boolean Data Type & What Does it Do?

What is a Boolean data type in C++?

A Boolean data type in C++ is a data type that stores a value of either true or false. It is used to represent logical values in a program. It is named after the mathematician George Boole, who developed Boolean algebra.

How is the Boolean data type represented in C++?

In C++, the Boolean data type is represented using the keywords "bool" or "boolean". It can only hold two values - true or false - which are also represented as 1 and 0, respectively.

What is the purpose of using Boolean data types in C++?

Boolean data types are used in C++ to make logical decisions in a program. They are often used in conditional statements, loops, and comparisons to determine the flow of the program based on true or false values.

What are some examples of using Boolean data types in C++?

One example of using Boolean data types in C++ is in an if statement, where the condition is evaluated as either true or false and the corresponding code is executed. Another example is in a while loop, where the loop will continue running as long as the condition is true.

Can other data types be converted to Boolean in C++?

Yes, in C++, any data type can be implicitly or explicitly converted to a Boolean value. By default, any non-zero value is considered as true and a zero value is considered as false. However, it is important to note that this conversion can sometimes lead to unexpected results and should be used with caution.

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