Sample APIs problems

api.js

Array map 

const arr = [2,3,4,5]
arr.map((el) => 2 * el)
Output = [4,6,8,10] 

String repeat

const city = “ajmer”
city.repeat(5)
Output = “ajmerajmerajmerajmerajmer”


Array reduce

const arr = [2,3,4,5]
arr.reduce((sum, el) => sum + el)
Output = 14