// [8,1,3,5,2,-1,10]得到数组中每个元素的平方,用map
let arr24 = [8,1,3,5,2,-1,10];
let newArr = arr24.map((item) => {
return item * item;
})
console.log(newArr)
// [8,1,3,5,2,-1,10]得到数组中每个元素的平方,用map
let arr24 = [8,1,3,5,2,-1,10];
let newArr = arr24.map((item) => {
return item * item;
})
console.log(newArr)