Flash cards
Review the key moves
What is the main idea behind C++ Logical Operators in Conditions?
Lesson checks
Practice each idea before moving on
Short Mimo-style checks built from this lesson's code, terms, and sequence.
Which statement best captures the main point of this lesson?
Put the learning moves in the order that makes the concept easiest to apply.
Logical Operators in Conditions
You can combine or reverse conditions using logical operators . These work together with if , else , and else if to build more complex decisions.
- && (AND) - all conditions must be true
| - | (OR) - at least one condition must be true |
|---|
- ! (NOT) - reverses a condition ( true → false , false → true )
AND ( && )
Use AND ( && ) when both conditions must be true:
aOR ( || )
Use OR ( || ) when at least one of the conditions can be true:
aNOT ( ! )
The NOT operator ( ! ) reverses a condition:
- If a condition is true , ! makes it false .
- If a condition is false , ! makes it true .
This is useful when you want to check that something is not the case:
aReal-Life Example
In real programs, logical operators are often used for access control. For example, to get access to a system, there are specific requirements:
You must be logged in, and then you either need to be an admin, or have a high security clearance (level 1 or 2):
Example
bool isLoggedIn = true;
bool isAdmin = false;
int securityLevel = 3; // 1 = highest
if (isLoggedIn && (isAdmin || securityLevel <= 2)) {
cout << "Access granted.";
} else {
cout << "Access denied.";
}
// Try changing securityLevel and isAdmin to test different outcomes: // securityLevel 1 = Access granted // securityLevel 2 = Access granted // securityLevel 3 = Access denied // securityLevel 4 = Access denied // If isAdmin = true, access is granted.