While vs do-while

dowhilevswhile.java

//1
int number = 0;

while (number != 5) {
  number++
}

//2
int anotherNumber = 0;

do {
  number++;
} while (number !=5)

System.out.println(number == anotherNumber); //true

// 1 and 2 are equal at the end and in this case both loops have exactly the same behaviour

whilevsdowhilediff.java

//1
int number = 5;

while (number != 5) {
  number++
}

//2
int anotherNumber = 5;

do {
  number++;
} while (number !=5)

System.out.println(number == anotherNumber); //false

// 1 and 2 are not equal, because while loop first checks the condition (number != 5) and 
// do-while loop will always execute code at least once and then check the condition.