Ruby: for, while, Loop Examples

By Xah Lee. Date:

“for” Loop

#-*- coding: utf-8 -*-
# ruby

aa = 1..9 # creates a array 1 to 9
for xx in aa do
  p xx
end # prints 1 to 9

“while” Loop

#-*- coding: utf-8 -*-
# ruby

x = 1;
while x <= 9 do
  p x
  x += 1
end

Exiting Loop

#-*- coding: utf-8 -*-
# ruby

for xx in 1..9 do
  p xx
  if xx == 4 then break end
end # prints 1 to 4

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  1. Ruby Basics
  2. Doc Lookup
  3. Print Version String
  4. Unicode 💎
  5. Quote String
  6. Quote Long String
  7. Format String
  8. String Operations
  9. True, False
  10. “if then else”
  11. for, while, Loop
  12. List
  13. Loop Thru List
  14. Hash Table
  15. Function Optional Parameter
  16. Map f to List
  17. Complex Numbers
  18. Intro to Reading Ruby Doc: What's M, C, ::, # ?
  19. Predefined Global Variables
  20. What's RVM, Gem, Rake, Bundler, RDoc, ri, irb?