Dart Logical Operators

Logical operators are the operators that combine two or more conditions, and accordingly return a Boolean value : true or false.

Assume the value of variable A is 25 and B is 40.

AND and OR Operators ( && and || )

The && operator returns true if and only if both the conditions return true. If either of them is false, the result is also false.

The || operator returns true if any one of the expressions returns true. It returns false if and only if both conditions are false.

Program

Consider the following code in Dart that explains logical operator,

void main( )
{
    int a = 25 ;
    int b = 15 ;
 
    // Using And Operator ( && )
    // where both conditions are true
    bool c = a > 10 && b > 10 ;
    print( c ) ;


     // Using And Operator ( && )
    // where both conditions are false
    bool d = a > 50 && b < 10 ;
    print( d ) ;
  
    // Using Or Operator ( || )
    // where only one condition is true
    bool e = a > 10 || b < 10 ;
    print( e ) ;
  
    // Using Or Operator ( || )
    // where both conditions are false
    bool f = a > 50 || b < 10 ;
    print( f ) ;  
 
    // Using Not Operator ( ! )
    bool g = !( a > 10 ) ;
    print( g ) ;
}

Output

 true
 false
 true
 false
 false