while rails code example

Example 1: ruby for loop

for i in 0..2 do 
  print(i)
end

# => 0
# => 1
# => 2

Example 2: ruby for loop

for element in array do
  element.do_stuff
end

Example 3: rails loop

while $i < $num  do
   puts("Inside the loop i = #$i" )
   $i +=1
end