Generating random number in JavaScript

In JavaScript, you can generate a random number using the random() method. This method returns a number between 0 and 1 (including 0). 

Example

<!DOCTYPE html>
<html>
<body>
<p id="msparagraph"></p>
<button onclick="msrandom()">Generate random number</button>

<script>
function msrandom()
{
var p=document.getElementById('msparagraph');
p.innerHTML=Math.random();
}
</script>

</body>
</html>

Random number between two values

<script>
function getRandom(min, max)
{
var res=(Math.random() * (max - min) + min);
res=Math.floor(res);
document.getElementById('msparagraph1').innerHTML=res;
}
</script>
<p id="msparagraph1"></p>
<button onclick="getRandom(10, 20)"> Generate Random Numbers</button>
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