대문자 찾기 🕵️

function solution(s){
  let answer = 0;
  	for(let x of s){
		if(x === x.toUpperCase()){
			answer++;
		}
	}
  	return answer;
}

let str = "KoreaTimeGood";
console.log(solution(str));

대소문자로 통일 🔡 🟰 🔠

//배우는 과정이니까 for
function solution(s){
	let answer = "";
  	for(let x of s){
		if(x==x.toLowerCase()){
			answer += x.toUpperCase();
        } else {
			answer += x;
		}
	}
    return answer;
}
  
  let str = "ItisTimeToStudy"
  console.log(solution(str));

대소문자 변환 🔡 → 🔠

function solution(s){
	//let answer=s.toUpperCase();
  let answer="";
  for(let x of s){
	if(x===x.toUpperCase()){
		answer += x.toLowerCase();
	} else {
		answer += x.toLowerCase();
	}
    return answer;
	}
}
console.log(solution("StuDY"));