structure Boolean in Objective-C

In Objective-C, BOOL is a data type keyword that represents a boolean value. It can have either a YES (true) or NO (false) value.

Here are some examples of how to use boolean in Objective-C:

Example 1:

``objective-c BOOL isTrue = YES; if (isTrue) { NSLog(@"The value is true"); } else { NSLog(@"The value is false"); }



This code declares a BOOL variable named isTrue and assigns a YES value to it. Then it checks if the value is true using an if statement and logs the appropriate message.
Example 2:

objective-c

- (BOOL)isEvenNumber:(NSInteger)number {

    return (number % 2 == 0);

}
// Example usage:

BOOL result = [self isEvenNumber:4];

if (result) {

    NSLog(@"The number is even");

} else {

    NSLog(@"The number is odd");

}



In this example, we have defined a function named isEvenNumber that takes an integer parameter and returns a boolean value. The function checks if the number is even and returns YES if it is, otherwise it returns NO. We call this function with 4 as the parameter, which returns YES, so the code logs "The number is even".
Example 3:
objective-c

BOOL hasPassword = [password length] > 0;

if (!hasPassword) {

    NSLog(@"Please enter a password");

}

This code checks if the password variable has a length greater than zero, which means it has a value. If it does not have a value (hasPassword is NO`), it logs a message asking the user to enter a password.

These are just a few examples of how to use boolean in Objective-C. Boolean values are very useful for logic and control flow statements in programming.

structure Boolean in Objective-C

See this concept in other languages