About Lesson
What is Loop and How many types of loop?
Loops are used to execute the same block of code repeatedly as long as a condition is true.
PHP supports the following loops:
| Loop Type | Description |
|---|---|
while | Repeats as long as the condition is true |
do...while | Executes the code block once, then repeats as long as the condition is true |
for | Loops through a block of code a specified number of times |
foreach | Loops through each item in an array |
🔁 1. while Loop
Syntax:
while (condition) {
// code to be executed
}
Example:
PHP
<?php
$x = 1;
while ($x <= 5) {
echo "Number: $x <br>";
$x++;
}
?>
🔁 2. do...while Loop
Syntax:
do{
// code to be executed
} while (condition);
Example:
PHP
<?php
$x = 1;
do {
echo "Count: $x <br>";
$x++;
} while ($x <= 3);
?>✔ Executes the loop at least once, even if the condition is false.
🔁 3. for Loop
Syntax:
for (initialization; condition; increment) {
// code to be executed
}
Example:
PHP
<?php
for ($i = 1; $i <= 5; $i++) {
echo "Line $i <br>";
}
?>
🔁 4. foreach Loop (Used for Arrays)
Syntax:
foreach ($array as $value) {
// code to be executed
}
Example:
PHP
<?php
$colors = ["Red", "Green", "Blue"];
foreach ($colors as $color) {
echo "$color <br>";
}
?>⚠️ Loop Control Statements
| Statement | Use |
|---|---|
break | Stop the loop entirely |
continue | Skip current iteration and go to the next |
Example:
PHP
<?php
for ($i = 1; $i <= 5; $i++) {
if ($i == 3) {
continue; // Skips number 3
}
echo "$i <br>";
}
?>