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JavaScript: Uncapitalize the first character of a string

JavaScript String: Exercise-39 with Solution

Write a JavaScript function to uncapitalize the first character of a string.

Test Data:
console.log(Uncapitalize('Js string exercises'));
"js string exercises"

Pictorial Presentation:

JavaScript:  Uncapitalize the first character of a string

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to uncapitalize the first character of a string.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function Uncapitalize(str1){
  return str1.charAt(0).toLowerCase() + str1.slice(1);
}
 console.log(Uncapitalize('Js string exercises'));
 

Sample Output:

js string exercises

Flowchart:

Flowchart: JavaScript: Uncapitalize  the first character of a string

Live Demo:

See the Pen JavaScript Uncapitalize the first character of a string-string-ex-39 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript function to create a case-insensitive search.
Next: Write a JavaScript function to Uncapitalize the first letter of each word of a string.

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JavaScript: Tips of the Day

How to check whether a string contains a substring in JavaScript?

ECMAScript 6 introduced String.prototype.includes:

const string = "foo";
const substring = "oo";

console.log(string.includes(substring));

includes doesn't have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found:

var string = "foo";
var substring = "oo";

console.log(string.indexOf(substring) !== -1);

Ref: https://bit.ly/3fFFgZv