Iterators in Ruby

iterators.rb

# working with iterators

3.times { puts "thank you!" }

puts("\n")

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

data.each {|x| puts x} # note how x although its not being declared or defined.. works for each element of the array data..

puts("\n")

[1,2,3,4,5].map { |x| puts x*x }


# see the beauty of iterators in Ruby in terms of how the factorial is implemented...


print("Enter the number whose factorial you want to find out: ")
n = gets.to_i


$factorial = 1
2.upto(n) { |x| $factorial *= x }

puts("Factorial of #{n} is:- #{$factorial} ")

iterators_output

thank you!
thank you!
thank you!

1
2
3
4
5

1
4
9
16
25
Enter the number whose factorial you want to find out: 4
Factorial of 4 is:- 24