2278. Percentage of Letter in String

Question

Given a string s and a character letter, return* the percentage of characters in s that equal letter rounded down to the nearest whole percent.*

Solution

一次遍历，计算字符出现的次数。
返回字符出现的次数除以字符长度乘以100。

Code

class Solution {
    public int percentageLetter(String s, char letter) {
        int count = 0;
        for(int i = 0; i < s.length(); i++){
            if(s.charAt(i) == letter){
                count++;
            }
        }
        return count * 100 / s.length();
    }
}