PHP LOOPING
We control the statement in two different ways
1.Branching
1.Branching
2.Looping
Looping statements in PHP are used to execute the same block of code a specified number of times.
Looping:
Very often when you write code, you want the block of code to run a number of times.You can use looping statements in your code to perform this.
Not only PHP, In programming we have the following looping statements:
1.While loop:
In while, loops through the block of code if and as long as a specified condition is true.
2.Do...while :
loops through a block of code once, and then repeats the loop as long as a special condition is true.
3.For:
In for, loops through a block of code a specified number of times.
4.For each:
loops through a block of code for each element in an array.
The while statement:
The while statement executes a block of code if and as long as a condition is true.
Syntax:
while(condition)
code to be executed;
Example:
The following example will explain the while loop conditions.
<html>
<body>
<?php
$i=1;
while($i < =6)
{
echo "The number is" . $i . "<br/>";
$i++;
}
?>
</body>
</html>
Output:
The numer is: 1
The numer is: 2
The numer is: 3
The numer is: 4
The numer is: 5
The numer is: 6
Do..while statement:
The do while statement will execute a block of code at least once,it will repeat the loop as long as a condition is true.
syntax:
do
{
code to be executed;
}
while(condition);
Output:
The numer is: 1
The numer is: 2
The numer is: 3
The numer is: 4
The numer is: 5
The numer is: 6
Do..while statement:
The do while statement will execute a block of code at least once,it will repeat the loop as long as a condition is true.
syntax:
do
{
code to be executed;
}
while(condition);
<html>
<body>
<?php
$i=0;
do
{
$i++;
echo "The number is" . $i . "<br />";
}
while ($ i < 5);
?>
</body>
</html>
Output:
The numer is : 1
The numer is : 2
The numer is : 3
The numer is : 4
The numer is : 5
The for statment:
Output:
The number is:0
The number is:1
The number is:2
The number is:3
The number is:4
The number is:5
$i=0;
do
{
$i++;
echo "The number is" . $i . "<br />";
}
while ($ i < 5);
?>
</body>
</html>
Output:
The numer is : 1
The numer is : 2
The numer is : 3
The numer is : 4
The numer is : 5
The for statment:
<html>
<body>
<?php
for($x=0;$x <=5; $++)
echo "The number is: $x <br>";
}
?>
for($x=0;$x <=5; $++)
echo "The number is: $x <br>";
}
?>
</body>
</html>
Output:
The number is:0
The number is:1
The number is:2
The number is:3
The number is:4
The number is:5
No comments:
Post a Comment