The JavaScript random() method returns a random number from 0 (included) up to but not including 1.
Syntax:
Math.random()Example:
<!DOCTYPE html>
<html>
<body>
<p id="example"></p>
<script>
document.getElementById("example").innerHTML = Math.random();
</script>
</body>
</html>Output:
Math.random() used with Math.floor() can be used to return random integers:
<!DOCTYPE html>
<html>
<body>
<p>Every time you click the button, getRandomInteger(min, max) returns a random number between 1 and 20 (both included):</p>
<button onclick="document.getElementById('example-2').innerHTML = getRandomInteger(1,20)">Click Me</button>
<p id="example-2"></p>
<script>
function getRandomInteger(min, max) {
return Math.floor(Math.random() * (max - min + 1) ) + min;
}
</script>
</body>
</html>Output:
Every time you click the button, getRandomInteger(min, max) returns a random number between 1 and 20 (both included):
Enjoy coding!
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