PHP For Loop Tutorial

For Loop

For loop executes a certain condition as many times as you want.

Syntax
for(intial value; condition; increment)
{
// set of statements that will be executed
}
All the three parameters are separated by semicolon ";".
Loop is used to execute the same set of statements with a specified number of times(until a condition is satisfied) in incremental or detrimental way.

Example: 1

        <?php
       for($num=1; $num<=5; $num++)
        {
        echo $num."<br />";
        }
        ?>

Output

1
2
3
4
5

Note: When “i<=5” executes, then condition remain true and loop terminates when “i=6”. “i<=5” says “i is less than or equal to 5”.

Example: 2

        <?php
       $sum=0;
       for($i=1; $i<5; $i++)
       {
       $sum = $sum+$i;
       }
       echo "The sum of 1 through 4 is: ".$sum; 
        ?>

Output

The sum of 1 through 4 is: 10