FAQ: Methods, Blocks, & Sorting - Blocks

This community-built FAQ covers the “Blocks” exercise from the lesson “Methods, Blocks, & Sorting”.

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For the following excersize I attempted to x^2 the array utilizing the each method… Attempt 1 is successful but I don’t understand why Attempt 2 and 3 are not


Line 23 is unexpected end. That can go. Blocks don’t have a do or end.

Line 13 is a single assignment. Only that last iteration will persist. Define multi as an empty array (before the loop) then << (push) to that array inside the method. (Note. This is akin to mapping.)

What is wrong with my attempt??

my_array = [1, 2, 3, 4, 5]

my_array.each do |n|
  puts n**

it writes

(ruby):4: syntax error, unexpected keyword_end

Thank you!!

The exponentation operator requires two operands, the base, and the exponent.

puts n ** 2