JavaScript: Validate whether a given value type is char or not

Last update on December 16 2024 12:31:47 (UTC/GMT +8 hours)

JavaScript validation: Exercise-9 with Solution

Validate Char

Write a JavaScript function to validate whether a given value type is char or not.

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to validate whether a given value type is char or not</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function is_char(value)
    {
      if (Object.prototype.toString.call(value) !== '[object String]')
        return false;
    return value && value.length === 1;
    }
 
console.log(is_char('f'));
console.log(is_char('*'));

Sample Output:

true
true

Flowchart:

Live Demo:

See the Pen javascript-validation-exercise-9 by w3resource (@w3resource) on CodePen.

Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript function to validate whether a given value is RegExp or not.
Next: Write a JavaScript function to check whether given value types are same or not.