array = (1..10).to_a

# 方法1

length = array.length

length.times do |t|

 print "#{array[t]} "

end

puts "\n"

# 方法2

length = array.length-1

for i in 0..length do

  print "#{array[i]} "

end

puts "\n"

# 方法3

for i in array do

  print "#{i} "

end

puts "\n"

# 方法4

array.each{|x| print x," "}

puts "\n"

# 方法5

length = array.length

i = 0

while i< length do

  print "#{array[i]} "

  i = i+1

end

puts "\n"

# 方法6

length = array.length

i = 0

until i==length do

  print "#{array[i]} "

  i += 1

end

puts "\n"

# 方法7

array.each_index do |i|

    print "#{array[i]} "

end

puts "\n"

# 方法8

length = array.length - 1

0.upto(length) do |i|

  print "#{array[i]} "

end

puts "\n"

# 方法9

length = array.length - 1

i = 0

loop do

  print "#{array[i]} "

  i += 1

  break if i > length #也可以用break unless i <= length

end