3110. Score of a String

QUESTION:

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.

EXPLANATION:

比较简单, 一个for循环就可以解决问题了.

SOLUTION:

class Solution {
    func scoreOfString(_ s: String) -> Int {
        var result: Int = 0
        let chs:[Character] = Array(s)
        for i in 0...chs.count-2 {
            result += abs(Int(chs[i].asciiValue!) - Int(chs[i+1].asciiValue!))
        }
        return result
    }
}
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