If, If else, If elseif else statements

if(1==1){ //checking if 1 is equal to one
    System.out.println("one is equal to one"); //prints out the message if that is true
}
one is equal to one
var num = 2; //creating a random variable (num) and assigning a value to it
if (num == 1){ //checking to see if that value of the variable is equal to one
    System.out.println("num is equal to one"); //if num is equal to one we want to print it out
}
else{ //if the if statement is NOT true proceed with this
    System.out.println("num is not equal to one"); // if the value does not equal to one we want to also print that out
}
num is not equal to one
var num = 15; //creating a random variable (num) and assigning a value to it
if(num < 10){ //checking to see if num is less than 10
    System.out.println("num is less than 10"); //print result 
}
else if(num > 10){ //checking to see if num is greater than 10
    System.out.println("num is greater than 10"); //print result 
}
else{ //If both of the previous statements are false then the number has to equal to 10
    System.out.println("num is equal to 10"); //print result 
}
num is greater than 10

switch-case

int randomNum = (int)(Math.random() * 6);  // random number between 0 to 5
if(randomNum == 0){ //Checking if the random number is 0
    System.out.println("The number is: 0"); //printing out the random number if its 0
}
else if(randomNum == 1){ //Checking if the random number is 1
    System.out.println("The number is: 1"); //printing out the random number if its 1
}
else if(randomNum == 2){ //Checking if the random number is 2
    System.out.println("The number is: 2"); //printing out the random number if its 2
}
else if(randomNum == 3){ //Checking if the random number is 3
    System.out.println("The number is: 3"); //printing out the random number if its 3
}
else if(randomNum == 4){ //Checking if the random number is 4
    System.out.println("The number is: 4"); //printing out the random number if its 4
}
else{ //if everything else is false then the number is five
    System.out.println("The number is: 5"); //printing out the random number if its 5
}
The number is: 1

lets put this into a different form called switch-case-otherwise

int randomNum = (int)(Math.random() * 6);  // random number between 0 to 5
switch (randomNum) {
  case 0: //Checks if randomNum is equal to zero
    System.out.println("The number is: 0"); //printing out the random number if its 0
    break; //stops the code
  case 1: //Checks if randomNum is equal to one
    System.out.println("The number is: 1"); //printing out the random number if its 1
    break; //stops the code
  case 2: //Checks if randomNum is equal to two
    System.out.println("The number is: 2"); //printing out the random number if its 2
    break; //stops the code
  case 3: //Checks if randomNum is equal to three
    System.out.println("The number is: 3"); //printing out the random number if its 3
    break; //stops the code
  case 4: //Checks if randomNum is equal to four
    System.out.println("The number is: 4"); //printing out the random number if its 3
    break; //stops the code
  default: //If none of them are true then proceed
    System.out.println("The number is: 5"); //printing out the random number if its 3
    break; //stops the code
}
The number is: 3

De Morgan's law

Description:

The complement of the union of the two sets A and B will be equal to the intersection of A' (complement of A) and B' (complement of B). In simpler terms, the opposite of a and b is equal to the opposite of a or the opposite of b. The opposite of a or b is equal to the opposite of a and the opposite of b.

var a = true; //creating a variable with a value of true
var b = false; //creating a variable with a value of false
if (!(a&b) == !a|!b){ // checks if De Morgan's law is correct
    System.out.println("De Morgan's law is true"); //prints out the result
}
De Morgan's law is true
var a = true; //creating a variable with a value of true
var b = false; //creating a variable with a value of false
if (!(a|b) == !a&!b){ // checks if De Morgan's law is correct
    System.out.println("De Morgan's law is true"); //prints out the result
}
De Morgan's law is true
var a = true; //creating a variable with a value of true
var b = false; //creating a variable with a value of false
if (!(a&b) == !a&!b){ // checks if De Morgan's law is correct
    System.out.println("De Morgan's law is not true"); //prints out the result
}
else{ // if not true then proceed
    System.out.println("De Morgan's law is true"); //prints out the result
}
De Morgan's law is true