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loop in PHP

Loop is used to iterate a block of code mulitple times (till the given condition is true) .

There are following types of loop supported in PHP.

1)while loop

2) do while loop

3) for loop

4 for each loop

While loop syntax

while(<condition>)
{
  // body part to be executed till the condtion is true
}

   <?php
    $i=1;
     while($i<=100)
      {
       echo "$i";
       $i++;
     }
    ?>

Above program prints the no 1-to 100 with the help of while loop.

Do While loop Syntax

//this loop executes at least once because the while condition is after do part
do
 {
   // body to be executed but executes at least once
 }
while(<condtion>);


   <?php
    $i=100;
     do{
       echo "hello";
        $i++;
      }
     while($i<0);
    ?>

Above program prints 1 time even if the condition is not true first time as well.

For loop syntax

//in for loop all three parts are in the loop the initialization,condition and increment/decrement
for(initialization; condition; increment/decrement)
 {
  //body part to be executed till the condition is true.
 }

 <?php
  $n=5;
  for($i=1; $i<=10; $i++)
   {
    echo "<br>".($n*$i);
    }
   ?>

Above program prints prints the table of the given no ie 5.

For each loop in php

   <?php
    $city=array("Delhi", "Mumbai", "Chennai");
     foreach($city as $c)
       {
        echo "$c<br>";
       }
    ?>

For each loop works only on arrya as above program which prints the all city in the given array.

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loop in PHP

While loop syntax

Do While loop Syntax

For loop syntax

For each loop in php

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