mfr.js 52.js

let arr = [1, 13, 5, 7, 11];
// let newArr = []
// for (let index = 0; index < arr.length; index++) {
//     const element = arr[index];
//     newArr.push(element**2)
// }

let newArr = arr.map((e, index, array)=>{
    return e**2
})

console.log(newArr)
const greaterThanSeven = (e)=>{
    if(e>7){
        return true
    }
    return false
}
console.log(arr.filter(greaterThanSeven))

let arr2 = [1,2,3,4,5,6]

const red = (a, b)=>{
    return a*b
}

console.log(arr2.reduce(red))