Liang zhang
Liang zhang
let arr =[1, 2, 3, 4, 5, 6, 7]; function reverse(arr,k) { while (k) { arr = [arr.pop()].concat(arr); k--; } return arr; } reverse(arr,3);
let string = 'aBc'; let newString = ''; for (let item of string){ if(item ==item.toLowerCase()){ newString+=item.toUpperCase(); }else{ newString+=item.toLowerCase(); } } console.log(newString);
same here .and can anyone help us? please