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JavaScript: Create a new string from a given string with the first character of the given string added at the front and back

JavaScript Basic: Exercise-24 with Solution

Write a JavaScript program to create another string from a given string with the first character of the given string added to the front and back.

Pictorial Presentation:

JavaScript: Create a new string from a given string with the first character of the given string added at the front and back

Sample Solution:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>JavaScript program to create a new string from a given string with the first character of the given string added at the front and back.</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function front_back(str)
{
  first = str.substring(0,1);
  return first + str + first;
}
console.log(front_back('a'));
console.log(front_back('ab'));
console.log(front_back('abc'));

Sample Output:

aaa
aaba
aabca

Flowchart:

Flowchart: JavaScript - Create a new string from a given string with the first character of the given string added at the front and back

ES6 Version:

function front_back(str)
{
  first = str.substring(0,1);
  return first + str + first;
}
console.log(front_back('a'));
console.log(front_back('ab'));
console.log(front_back('abc'));

Live Demo:

See the Pen JavaScript: string added at the front and back: basic-ex-24 by w3resource (@w3resource) on CodePen.


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JavaScript: Tips of the Day

Returns the last element for which the provided function returns a truthy value

Example:

const tips_findLast = (arr, fn) => arr.filter(fn).pop();
console.log(tips_findLast([2, 3, 4, 5, 6], n => n % 2 === 1));

Output:

5

 

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