Ruby feels like Perl in that there's a TON of different ways to do one thing. Bloated API? Theme music: Ween - So many people in the neighborhood

1_to_5.rb

# loop
x = 0
loop do
    x += 1
    puts x
    break if x > 4
end
 
puts
 
# while
i = 0
while i < 5
    i += 1
    puts i 
end
 
puts
 
# until
j = 0
until j > 4
    j += 1
    puts j
end
 
puts
 
# for
num = (1..5)
for n in num
    puts n
end
 
puts
 
# times
t = 1
5.times do
  puts t
  t += 1
end

Use loop when you want an infinite loop.

Use while when you want to keep checking something for a state change.

Don't use until. Just don't.

Don't use for. Use each when you want to iterate through something.

Use times when you want to do something a certain number of times.