const nestedArrayToString = (arr) => {
let str = '';
for (let i = 0; i < arr.length; i++) {
if (Array.isArray(arr[i])) {
str += nestedArrayToString(arr[i]);
} else {
str += arr[i] + " ";
}
}
return str;
};
const arr = [
'javascript', [
'programming', 'language', 'for', [
'98%', [
'of', 'websites'
]
]
]
];
console.log(nestedArrayToString(arr));
/*
run:
"javascript programming language for 98% of websites "
*/