How to specify range on math.random?

AdamH Published at Dev

AdamH

<html>
<head>
</head>
<body>
<input type="Textbox" id="pwbx" />

<button OnClick="GetRandom()" type="button">generate</button>
<script>
function getCharacter() {
return Math.floor(Math.random() * 18).toString(18);
}
for( var str="", i=0, l=14+Math.floor(Math.random()*3); i<l; i++) {
str += getCharacter();
}
</script>
</body>
</html>

This gives me a random number under 1, like 0.4567432112 etc.

How would I alter this to give me a string of between 14 and 16 characters, random alphanumerical? So a string of either 14, 15 or 16 characters made up of abcdefgh0123456789?

Thanks

Naeem Shaikh

This will return you a string with random length from 14-16

function getRandomString(min, max) {

      num=  Math.ceil(Math.random()*3)+14;

      var text="";

     var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
            for( var i=0; i < num; i++ )
            {
              text += possible.charAt(Math.floor(Math.random() * possible.length));
            }      
}

also refer this, Generate random string/characters in JavaScript

edit:

    <html>
    <head>
    </head>
    <body>
    <input type="Textbox" id="pwbx" />
    
    <button OnClick="GetRandom()" type="button">generate</button>
    <script>
    function GetRandom(min, max) {

          num=  Math.ceil(Math.random()*3)+14;

          var text="";

         var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
                for( var i=0; i < num; i++ )
                {
                  text += possible.charAt(Math.floor(Math.random() * possible.length));
                }     
    document.getElementById("pwbx").value=text ;

 
    }

    </script>
    </body>
    </html>

Collected from the Internet

Please contact [email protected] to delete if infringement.