PHP - Loop with condition on the beginning: while

Condition testing is done at the beginning of the loop. before each iteration the condition is tested, if it is was true. before the first iteration is a condition test, the use of this loop is excellent in situations where perhaps we don't need to execute the cycle.

while

Description

while (condition) statement

Used keywords: while

Input

condition - Logical value The condition can be any expression
statement - statements

Note: Here usable statements:
break statement continue statement

Examples

PHP

Loop with condition on the beginning the possible of use:

$i=0;
while ($i<10) ++$i;
$x =0;
while ($i<20)
{
 $i= $i+2;
 if ($i==16)
 {
    continue;
 }
 $x++; 
}

PHP

Other pieces of example codes:

while ($i>0)
   if ($i==10)
     break;
   else 
   {
     $i--;
   }

while ($y>1)
{
  $x++;
  $y--;
}

if ( $x >= 12 )
   while ( $y >= 0 )  
      --$y;

while ( $y <= 32 )  
   $y++;

Loop with condition on the beginning in another programming language:

Differences to: