1.What is the output of the following code?

(0..3).each do |i|
  puts i if i.even?
end

2.In Ruby, what does the 'times' method return when used with a block?

3.Which method in Ruby is used to check if a given block returns true for at least one element of a collection?

4.In Ruby, what is the purpose of the 'break' statement in a loop?

5.What is the output of the following code?

i = 0
while i < 3
  puts i
  i += 1
end

6.In Ruby, how can you iterate over a collection in a random order?

7.In Ruby, what is the purpose of the 'unless' keyword?

8.What is the output of the following code?

(1..5).each do |i|
  break if i == 3
  puts i
end

9.Which keyword is used to exit the current iteration and proceed to the next one in a Ruby loop?

10.What is the purpose of the 'each_with_index' method in Ruby?

11.How can you iterate over a range of numbers in reverse order in Ruby?

12.In Ruby, what does the 'redo' statement do in a loop?

13.What is the purpose of the 'retry' statement in Ruby?

14.How can you iterate over the elements of an array in reverse order in Ruby?

15.What does the 'step' method do in Ruby when used with a range?

16.What is the output of the following code?

for i in 1..3
  puts i * 3
end

17.In Ruby, what is the purpose of the 'select' method?

18.How can you iterate over the elements of a hash in Ruby?

19.What does the 'do-while' loop in Ruby guarantee?

20.How do you iterate over a range of numbers in Ruby using a step value?