How can we output the last element of an array in Ruby without knowing the length of the array?

Answer 1

You can also do this (Much shorter)

a = [1, 2, 3, 4]
puts a[-1] #Outputs: 4

Answer 2

Example:

a = [1, 3, 4, 5].last
b = [2, 3, 1, 5, 6].last

Array#last method
a.last # => 5
b.last # => 6

Answer 3

Yeah, just like in Python, you can count backwards, arr[-1] being the last element, arr[-2] the second to last and so on..

Answer 4

-1 the last one
-2 next to last one

Answer 5

Use [ -1] index lead to the end element

Answer 6

[-1] is the last one

Answer 7

notsolvethis