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Add palindrome string algorithm using for loop (classical approach) #99

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Merged
akshitagupta15june merged 1 commit into from
Oct 22, 2020
Merged

Add palindrome string algorithm using for loop (classical approach) #99

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35 changes: 35 additions & 0 deletions Strings/palindrome.js
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/*
Classical palindrome js version.
"A palindrome is a word, number, phrase, or other sequence of
characters which reads the same backward as forward, such as madam, racecar."
https://en.wikipedia.org/wiki/Palindrome
*/

/**
* Returns if the string is palindrome or not
* case sensitive
* @param {string} string. Required
* @returns {boolean}
*/
function isPalindrome(string) {
const stringLength = string.length;

if (stringLength <= 1) return true;

for (let index = 0; index < stringLength / 2; index++) {
if (string[index] !== string[stringLength - 1 - index]) {
return false;
}
}

return true;
}

function isPalindromeTest() {
const stringList = ['', 'hi', 'ANA', 'racecar'];

for (string of stringList) {
console.assert(isPalindrome(string), 'Ups! %s is not palindrome :/', string);
}
}