题解 | #计算某字母出现次数#
计算某字母出现次数
http://www.nowcoder.com/practice/a35ce98431874e3a820dbe4b2d0508b1
const str = readline(); const char = readline(); function countChar(str, char) { const strWithLowerCase = str.toLowerCase(); const charWithLowerCase = char.toLowerCase(); let result = 0; for (let i = 0, l = str.length; i < l; i += 1) { if (charWithLowerCase === strWithLowerCase[i]) { result += 1; } } return result; } console.log(countChar(str, char));