3110. Score of a String

Easy

You are given a string s. The score of a string is defined as the sum of the absolute difference between the ASCII values of adjacent characters.

Return the score of s.

Example 1:

• Input: s = "hello"
• Output: 13
• Explanation:

The ASCII values of the characters in s are: 'h' = 104, 'e' = 101, 'l' = 108, 'o' = 111. So, the score of s would be |104 - 101| + |101 - 108| + |108 - 108| + |108 - 111| = 3 + 7 + 0 + 3 = 13.

Example 2:

• Input: s = "zaz"
• Output: 50
• Explanation:

The ASCII values of the characters in s are: 'z' = 122, 'a' = 97. So, the score of s would be |122 - 97| + |97 - 122| = 25 + 25 = 50.

Constraints:

• 2 <= s.length <= 100
• s consists only of lowercase English letters.

Solution:

class Solution {

    /**
     * @param String $s
     * @return Integer
     */
    function scoreOfString($s) {
        $ans = 0;

        for ($i = 1; $i < strlen($s); ++$i) {
            $ans += abs(ord($s[$i]) - ord($s[$i - 1]));
        }

        return $ans;
    }
}

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