Characters In Range JS

function charactersinRange(char1, char2) {
    let start = char1.charCodeAt(0);
    let end = char2.charCodeAt(0);
    let result = "";
    if (start <= end) {
        for (let i = start + 1; i < end; i++) {
            result += String.fromCharCode(i) + " ";
        }
    } else {
        for (let i = start - 1; i > end; i--) {
            result = String.fromCharCode(i) + " " + result;
        }
    }
    console.log(result.trim());
}