C++Boolean Examples
Real Life Example
Let's think of a "real life example" where we need to find out if a person is old enough to vote.
In the example below, we use the>= comparison operator to find out if the age (25) isgreater than OR equal to the voting age limit, which is set to18:
Example
int myAge = 25;
int votingAge = 18;
cout << (myAge >= votingAge); // returns 1 (true), meaning 25 year olds are allowed to vote!
Try it Yourself »int votingAge = 18;
cout << (myAge >= votingAge); // returns 1 (true), meaning 25 year olds are allowed to vote!
Cool, right? An even better approach (since we are on a roll now), would be to wrap the code above in anif...else statement, so we can perform different actions depending on the result:
Example
Output "Old enough to vote!" ifmyAge isgreater than or equal to18. Otherwise output "Not old enough to vote.":
int myAge = 25;
int votingAge = 18;
if (myAge >= votingAge) {
cout << "Old enough to vote!";
} else {
cout << "Not old enough to vote.";
}
// Outputs: Old enough to vote!
Try it Yourself »int votingAge = 18;
if (myAge >= votingAge) {
cout << "Old enough to vote!";
} else {
cout << "Not old enough to vote.";
}
// Outputs: Old enough to vote!
Booleans are the basis for all C++ comparisons and conditions.
You will learn more aboutconditions (if...else) in the next chapter.
