# Boolean data type

A Boolean data type is a data type that can be either one of these two values: true or false. The boolean data type was originally added to the C++ language by the ISO/ANSI(International Standards Organization/American National Standards Organization) committee in 1998. Type bool expressions are named after the English mathematician George Boole, who formulated rules for mathematical logic. Boolean expressions also end up with a value of either true or false. Boolean expressions are used in branching and looping statements. In programming, a boolean can be used with conditional statements (statements that only happen when the right condition is met).

## Examples

An example of a boolean in pseudocode:

```if (Boolean_Expression)

{

Yes_Statement_1

...

Yes_Statement_Last

}

else

{

No_Statement_1

...

No_Statement_Last

}
```

Boolean data types can also be used with other booleans inside of conditional statements using a conjunction operator. For example:

```if (Boolean_Expression1 and Boolean_Expression2)

{

Yes_Statement_First

...

Yes_Statement_Last

}

else

{

No_Statement_First

...

No_Statement_Last

}
```

It can also be used with a disjunction operator:

```if (Boolean_Expression1 or Boolean_Expression2)

{

Yes_Statement_First

...

Yes_Statement_Last

}
```