ELSE IF Statements

    var first_name = "Ricky"; 
    var last_name = "Bobby"; 
    var age = 45;
    var first = true; 
    var last = false;
    var bob; //undefined
    //Falsey
    //false, null, undefined, 0, “”, ‘’, NaN
     
    
    If( age <= 40 ){
    // if the value of age is less than or equal to 40
    } else if ( (age > 40) && (age < 50) ){
    // if age is greater than 40
    // && - means AND
    // || - means OR
    } else if ( age < 0) {
    // otherwise prevent something from happening
    } else {
    // greater than 50
    }
    // COMPARISON OPERATORS
    // < <= > >= == != ! === (are the same object, not just the same value)