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ovn_1.php
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<!DOCTYPE html>
<html lang="sv">
<head>
<meta charset="utf-8" />
<title>Grundkod för HTML5</title>
</head>
<body>
<h3>Övning 1</h3>
<?php
$fahrenheit = 68;
$celsius = 5 / 9 * ($fahrenheit - 32);
echo "Fahrenheit: " . $fahrenheit . "<br>";
echo "Celsius: " . $celsius . "<br>";
// Ändrat Fahrenheit-värde
$fahrenheit = 86;
$celsius = 5 / 9 * ($fahrenheit - 32);
echo "Fahrenheit: " . $fahrenheit . "<br>";
echo "Celsius: " . $celsius . "<br>";
?>
<h3>Övning 2</h3>
<?php
$text1 = "Kalle";
$enamn = "Anka";
$tal = 16;
$road = "Ankvägen";
// 1. Dubbelfnuttar
echo "$text1 $enamn bor på $road $tal<br>";
// 2. Enkelfnuttar + concatenation
echo $text1 . " " . $enamn . " bor på " . $road . " " . $tal . "<br>";
// 3. Concatenation
echo $text1 . " " . $enamn . " bor på " . $road . " " . $tal;
?>
<h3>Övning 3</h3>
<h5>a</h5>
<?php
$summa = 0;
for ($i = 1; $i <= 100; $i++) {
$summa = $summa + $i;
}
echo "Summan är: " . $summa;
?>
<h5>b</h5><?php
$summa = 0;
$i = 1;
while ($i <= 100) {
$summa = $summa + $i;
$i++;
}
echo "Summan är: " . $summa;
?>
<h3>Övning 4</h3>
<?php
for ($celsius = -20; $celsius <= 40; $celsius += 10) {
$fahrenheit = $celsius * 9 / 5 + 32;
echo $celsius . "°C = " . $fahrenheit . "°F<br>";
}
?>
<?php
$celsiusArray = [];
$fahrenheitArray = [];
for ($celsius = -20; $celsius <= 40; $celsius += 10) {
$fahrenheit = $celsius * 9 / 5 + 32;
$celsiusArray[] = $celsius;
$fahrenheitArray[] = $fahrenheit;
}
// 1. Egen loop
echo "Med egen loop:<br>";
for ($i = 0; $i < count($celsiusArray); $i++) {
echo $celsiusArray[$i] . "°C = " . $fahrenheitArray[$i] . "°F<br>";
}
// 2. var_dump
echo "<br>Med var_dump:<br>";
var_dump($celsiusArray);
var_dump($fahrenheitArray);
// 3. print_r
echo "<br>Med print_r:<br>";
print_r($celsiusArray);
echo "<br>";
print_r($fahrenheitArray);
?>
<h3>Övning 5</h3>
<?php
$tal = [];
for ($i = 0; $i < 10; $i++) {
$tal[] = 2 ** $i;
}
echo "Talen är:<br>";
print_r($tal);
// Beräkna medelvärdet
$summa = array_sum($tal);
$medel = $summa / count($tal);
echo "<br>Summan är: " . $summa;
echo "<br>Medelvärdet är: " . $medel;
?>
<h3>Övning 6</h3>
<?php
$antal = 0;
for ($tal = 2; $tal <= 100; $tal++) {
$arPrimtal = true;
for ($delare = 2; $delare < $tal; $delare++) {
if ($tal % $delare == 0) {
$arPrimtal = false;
break;
}
}
if ($arPrimtal) {
echo $tal . " ";
$antal++;
}
}
echo "<br>Antal primtal: " . $antal;
?>
<h3>Övning 7</h3>
<?php
$antal = 0;
$tal = 2;
while ($antal < 100) {
$arPrimtal = true;
for ($delare = 2; $delare < $tal; $delare++) {
if ($tal % $delare == 0) {
$arPrimtal = false;
break;
}
}
if ($arPrimtal) {
echo $tal . " ";
$antal++;
}
$tal++;
}
?>
</body>
</html>