JavaScript Random numbers are created with Math.random() function. It is mentioned below:
Random Function
Creating a proper random function to use for all random integer purposes can be a good idea. The following JavaScript function always returns a random number between min (included) and max (excluded):
<!DOCTYPE html>
<html>
<body>
<button onclick="document.getElementById('tacode').innerHTML = getRndInteger(0,8)">Click Me</button>
<p id="tacode"></p>
<script>
function getRndInteger(n, x) {
return Math.floor(Math.random() * (x - n) ) + n;
}
</script>
</body>
</html>
Output:
The following JavaScript function always returns a random number between min and max (both included):
<!DOCTYPE html>
<html>
<body>
<button onclick="document.getElementById('tacode').innerHTML = getRndInteger(1,8)">Click Me</button>
<p id="tacode"></p>
<script>
function getRndInteger(n, x) {
return Math.floor(Math.random() * (x - n + 1) ) + n;
}
</script>
</body>
</html>
Output:
Math.random()
The Math.random() method is used to return a random number between 0 (inclusive), and 1 (exclusive). It always returns a number less than 1.
JavaScript Random – Integers
The Math.random() method can be used with Math.floor() to return random integers.