Java Basics - Control Flow and Conditionals 2

Logical Operators

 There are three main logical operators:

AND  &&
For example: 3<5 && 2> 15  results in false
AND needs both of its conditions to be true to evaluate to true.

OR        ||
For example:3< 5 || 2>15 results to true
OR only needs one of its conditions to be true to evaluate to true.

NOT     !
For example:!(3<5) results to false
The NOT turns a boolean value into its opposite value

The order of operations is:

1. Parentheses ()
2. NOT !
3. AND &&
4. OR ||

More on Logical Operators

AND evaluates before OR. 
So false&&true||true  evaluates to true 
while false&&(true||true) evaluates to false
_______________________________________________

Nested IF Statements

This means that an if statement is within an if statement.

if(condition1 ==true){
       if(condition2 == true) {} //this is the nested if statement.
}



Comments

Post a Comment

Popular posts from this blog

OOP - Objects and Classes

Classes Classes and objects are different terms Classes are an object type. You can create as many objects as you want of a class For example if a class has many fields and one of those is country, then an object would be Australia. In summary Objects are to Classes what Variables  are to Data types. For example  class Pokemon { String name;        //Field String type;         //Field int health;            //Field boolean dodge(){                        //Methods    return Math.random()>0.5; } } In Java each class should be created in its own file and have the extension ".java" For examples classes might be  vehicle.java   or map.java ________________________________________ The main method: This is where the program starts Inside it you can create objects and call methods to run othe...
Read more

Java Basics - Errors

Syntax errors (Compile-time error) -Violation of Java's grammatical rules -Will not compile Runtime errors -Happens while programming is running -Will Cause the program to crash Bugs (logical) -Program that just does not do what you expect.
Read more

Java Basics - Arrays 1

Arrays  Arrays allow us to store many variables or strings in one place. For example month[0] = "January"; month[1] = "February"; month[2] = "March"; We can add numbers as well int number[0] =1; int number[1] = 5; int sum = number[0] and number [1]; //sum = 6; How do we declare an array int [] numbers {12,-2,4,6,-9,0,2}; double[] numbers {12.896,-2,4,6,-9.2,0,2};
Read more