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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:

JavaScript Code:

// Define a function named front_back that takes a parameter str
function front_back(str) {
  // Extract the first character of str
  first = str.substring(0, 1);
  // Return the concatenation of first, str, and first
  return first + str + first;
}

// Log the result of calling the front_back function with the argument 'a' to the console
console.log(front_back('a'));

// Log the result of calling the front_back function with the argument 'ab' to the console
console.log(front_back('ab'));

// Log the result of calling the front_back function with the argument 'abc' to the console
console.log(front_back('abc')); 

Sample Output:

aaa
aaba
aabca

Live Demo:

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


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:

// Using ES6 arrow function syntax to define the front_back function
const front_back = (str) => {
  // Extract the first character of str
  const first = str.substring(0, 1);
  // Return the concatenation of first, str, and first
  return first + str + first;
};

// Log the result of calling the front_back function with the argument 'a' to the console
console.log(front_back('a'));

// Log the result of calling the front_back function with the argument 'ab' to the console
console.log(front_back('ab'));

// Log the result of calling the front_back function with the argument 'abc' to the console
console.log(front_back('abc'));

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