how to fix `print ([2, 4, 6].all?(:&even?)` in ruby

To fix the syntax error in your Ruby code, you need to remove the colon before the & operator in the all? method. Here is the corrected code:

main.rb
print [2, 4, 6].all?(&:even?)
30 chars
2 lines

In this code, &:even? is a shorthand notation for passing the even? method as a block to the all? method. It will return true if all elements in the array are even, and false otherwise.

Make sure to run the code in a Ruby environment to see the correct output.