Condicionals i bucles
If
<!DOCTYPE html>
<html>
<body>
<p>Click the button to get a time-based greeting:</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var greeting;
var time = new Date().getHours();
if (time < 10) {
greeting = "Good morning";
} else if (time < 20) {
greeting = "Good day";
} else {
greeting = "Good evening";
}
document.getElementById("demo").innerHTML = greeting;
}
</script>
</body>
</html>
Més informació a: w3schools.com - If
Switch
<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Switch</h2>
<p id="demo"></p>
<script>
var text;
switch (new Date().getDay()) {
case 6:
text = "Today is Saturday";
break;
case 0:
text = "Today is Sunday";
break;
default:
text = "Looking forward to the Weekend";
}
document.getElementById("demo").innerHTML = text;
</script>
</body>
</html>
Més informació a: w3schools.com - Switch
For
<!DOCTYPE html>
<html>
<body>
<h2>JavaScript For Loop</h2>
<p id="demo"></p>
<script>
var text = "";
var i;
for (i = 0; i < 5; i++) {
text += "The number is " + i + "<br>";
}
document.getElementById("demo").innerHTML = text;
</script>
</body>
</html>
Més informació a: w3schools.com - For Loop
While
<!DOCTYPE html>
<html>
<body>
<h2>JavaScript While Loop</h2>
<p id="demo"></p>
<script>
var text = "";
var i = 0;
while (i < 10) {
text += "<br>The number is " + i;
i++;
}
document.getElementById("demo").innerHTML = text;
</script>
</body>
</html>
Més informació a: w3schools.com - While Loop