LeetCode 3110. Score of a String

/**
 * @param {string} s
 * @return {number}
 */
var scoreOfString = function (s) {
    if (s.length < 2 || s.length > 100) {
        return 0
    }

    let sum = 0
    let j = 1
    for (let i = 0; i < s.length - 1; i++) {
        sum += Math.abs(s[i].charCodeAt(0) - s[j++].charCodeAt(0))
    }

    return sum
};