JAVA

Do..While Loop

A do...while loop is similar to a while loop, except that a do...while loop is guaranteed to execute at least one time. 

Syntax : 
do {
   // Statements
}while(Boolean_expression);
Notice that the Boolean expression appears at the end of the loop, so the statements in the loop execute once before the Boolean is tested.

If the Boolean expression is true, the control jumps back up to do statement, and the statements in the loop execute again. This process repeats until the Boolean expression is false.

Example of a Do..While Loop

public class Test {

   public static void main(String args[]) {
      int x = 10;

      do {
         System.out.print("value of x : " + x );
         x++;
         System.out.print("
");
      }while( x < 20 );
   }
}

Example of While Loop

public class Test {

   public static void main(String args[]) {
      int x = 10;

      while( x < 20 ) {
         System.out.print("value of x : " + x );
         x++;
         System.out.print("
");
      }
   }
}

do while loop

let i = true;
do{
	i= true; or // i = false;
}while(i == true);

what are while loops

# There are 2 types of loops in python
# while loops and for loops
# a while loops continues for an indefinite amount of time
# until a condition is met:

x = 0
y = 3
while x < y:
    print(x)
    x = x + 1

>>> 0
>>> 1
>>> 2

# The number of iterations (loops) that the while loop above
# performs is dependent on the value of y and can therefore change

######################################################################

# below is the equivalent for loop:
for i in range(0, 3):
    print(i)

>>> 0
>>> 1
>>> 2

# The for loop above is a definite loop which means that it will always
# loop three times (because of the range I have set)
# notice that the loop begins at 0 and goes up to one less than 3.

do while loop

<?php
	$num=1;
	do{
		$num++;
		echo"The number is ".$num."<br>";
	}
	while($num<=5);
	
//======output=====
/*
The number is 2
The number is 3
The number is 4
The number is 5
The number is 6
*/

?>