For Loop in PHP

The for loop allows you to repeat some code a specified number of times. Here is its syntax:

Here is its syntax:

<?php
	for ( initial commands; end condition; commands after each iteration ) {
		loop body
	}
?>

Initial commands - this is what will be executed before the loop starts. They are executed only once. Usually, initial counter values are placed there. End condition - this is the condition under which the loop will run while it is true. Commands after each iteration - these are commands that will be executed every time at the end of a loop iteration. Usually, counters are incremented there.

Let's use the for loop to display numbers from 1 to 9 sequentially:

<?php
	for ($i = 1; $i <= 9; $i++) {
		echo $i;
	}
?>

Now let's increment the counter not by 1, but by 2:

<?php
	for ($i = 1; $i <= 9; $i += 2) {
		echo $i;
	}
?>

You can perform a countdown:

<?php
	for ($i = 10; $i > 0; $i--) {
		echo $i;
	}
?>

Use the for loop to display numbers from 1 to 100.

Use the for loop to display numbers from 11 to 33.

Use the for loop to display even numbers in the range from 0 to 100.

Use the for loop to display odd numbers in the range from 1 to 99.

Use the for loop to display numbers from 100 to 0.