demo of array methods

loop over all fruits

forEach

filter all fruits that start with 'p'

filter

map creates new fruits array where elements are <fruit>✼

map

reduce numbers array to its sum

reduce

the index of kiwi in fruit array is

indexOf

does mango includes in fruits array?

includes

sort numbers in descending

sort

join numbers by ✼

join

push 100 at the end

push

removes the last element from numbers

pop

removes the first element from numbers

shift

push 100 at the start

unshift

reverse numbers array

reverse