How to use Nested Loop Structure In Javascript
In this approach, we iterates by trimming characters from the end of the string until it forms a palindrome. It checks each iteration if the string is a palindrome by comparing characters from both ends. The process counts the removed characters and stops when the string becomes a palindrome, displaying the total removed characters.
Example:
let inputString = 'BABABAA';
let minChars = 0;
for ( ; ; ) {
let isPalindrome = true;
for (let i = 0; i < inputString.length; i++) {
if (inputString[i] !==
inputString[inputString.length - i - 1]) {
isPalindrome = false;
break;
}
}
if (isPalindrome) {
break;
} else {
minChars++;
inputString = inputString.slice(0, -1);
}
}
console.log(`Minimum characters to make
"${inputString}" a palindrome: ${minChars}`);
Output
Minimum characters to make "BABAB" a palindrome: 2
Add Minimum Characters at Front to Make String Palindrome in JavaScript
The minimum characters to add at the front to make the string palindrome means the smallest count of characters required to prepend to the beginning of a given string. It ensures that the resultant string reads the same forwards and backward. This process creates a palindrome from the original string with the least added characters at its start.
Here are some common approaches:
Table of Content
- Using Recursion
- Using Nested Loop Structure
- Using Two-Pointer Technique