Discusses the basic concept of loop structure, also known as looping, and practicing how to use for, while, do while, and Foreach loops.
Looping (sometimes also called iteration) is a program instruction that commands a task to be repeated based on certain conditions.
1. FOR Loop#
It is a very simple form of looping; by using this function, you can repeat data until it exceeds the desired limit.
for (init counter; test counter; increment counter) {
code to be executed;
}2. WHILE Loop#
In this form of looping, the statement will continue to be executed if it has not yet reached the loop limit.
while (condition is true) {
code to be executed;
}3. DO – WHILE Loop#
The statement will be executed first before checking the loop limit. If it has not yet reached the loop limit, the repetition will continue.
do {
code to be executed;
} while (condition is true);4. foreach Statement -#
A loop executed for a block of code for each element present in an array.
foreach ($array as $value) {
code to be executed;
}Example:
1. FOR Loop = contohfor.php#
<html>
<head>
<title> Perulangan FOR </title>
</head>
<body>
nilai awal angka = 1
<br><br>
<?php
for ($angka = 1; $angka <= 10 ; $angka++)
{
echo "Angka :".$angka."<br>";
}
?>
</body>
</html>
2. FOR Loop in FORM = contohfor_form.php#
<html>
<head>
<title> Perulangan FOR </title>
</head>
<body>
Penggunaan pada form :
<br>
<?php
echo "<form name = form1 method=post>";
echo "Tanggal" ;
echo "<select name = tanggal>";
for ($tanggal = 1 ;$tanggal <=31 ; $tanggal++)
{
echo "<option value=".$tanggal.">".$tanggal."</option>";
}
echo "</select>";
echo "</form>";
?>
</body>
</html>
3. WHILE Loop = contohwhile.php#
<html>
<head>
<title> Penggunaan WHILE </title>
</head>
<body>
Menggunakan WHILE
<br>
<?php
$jumlah=1;
while ($jumlah <=5)
{
echo $jumlah++;
echo "<br>";
}
?>
</body>
</html>
4. DO - WHILE Loop = contohdowhile.php#
<html>
<head>
<title> Penggunaan DO WHILE </title>
</head>
<body>
Menggunakan DO WHILE
<br>
<?php
$jumlah=10;
do
{
echo $jumlah++;
echo "<br>";
}
while ($jumlah <=1)
?>
</body>
</html>
5. Foreach Loop = contoforeach.php#
<html>
<head>
<title> Penggunaan Foreach </title>
</head>
<body>
Menggunakan Foreach
<br>
<?php
$warna = array("merah","biru","hijau","kuning");
foreach ($warna as $nilai) {
echo "$nilai <br>";
}
?>
</body>
</html>
