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function checkPalindrome(str) {
    // find the length of a string
    const len = string.length;
    // loop through half of the string
    for (let i = 0; i < len / 2; i++) {
        // check if first and last string are same
        if (string[i] !== string[len - 1 - i]) {
            return 'It is not a palindrome';
        }
    }
    return 'It is a palindrome';
}
// take input
const string =prompt('Enter a string: ');
// call the function
const value = checkPalindrome(string);
console.log(value)
Output

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