JavaScript: Generates a string id (specified length) of random characters

Last update on November 22 2019 13:05:38 (UTC/GMT +8 hours)

JavaScript Function: Exercise-20 with Solution

Write a JavaScript function that generates a string id (specified length) of random characters.

Sample character list : "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"

Sample Solution: -

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Generates a string id (specified length) of random characters</title>
</head>
<body>
  
</body>
</html>

JavaScript Code:

function makeid(l)
{
var text = "";
var char_list = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
for(var i=0; i < l; i++ )
{  
text += char_list.charAt(Math.floor(Math.random() * char_list.length));
}
return text;
}
console.log(makeid(8));

Sample Output:

4SGqCfrz

Flowchart:

Live Demo:

See the Pen JavaScript - Generates a string id (specified length) of random characters-function-ex- 20 by w3resource (@w3resource) on CodePen.

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