ruby 红宝石团队树屋

Posted 2021-05-16

for number in 1..30
    puts number
end


------


for number in 1..30
    if number == 5
       puts "I like 5"
    end
       puts number
end
  rubyonrails-basics.rb
Ruby   Copy   Raw
The "Hello world!" program is a simple program that displays some text on the screen.

ruby -v  - what version is running


treehouse:~/workspace$ ruby -v                                                        
ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]                              
treehouse:~/workspace$ irb                                                            
irb(main):001:0> puts "Hello world"                                                   
Hello world                                                                           
=> nil                                                                                
irb(main):002:0>  


Exit irb:

irb(main):001:0> exit
Create a file called "hello.rb" and place the following in the file:

puts "Hello World!"
Run the program we just created by typing the following:

ruby hello.rb

Rules



irb(main):001:0> exit
Create a file called "hello.rb" and place the following in the file:

puts "Hello World!"
Run the program we just created by typing the following:

ruby hello.rb


------------

puts 
put string on the screen

gets 
get string input

-------------
Create a variable name = "priss"


file
name = "priss"
puts "hello"
puts name

console
treehouse:~/workspace$ ruby hello.rb                                                  
hello                                                                                 
Jason 

-------------
Put name on 1 line

name = "Jason"
puts "hello #{name}!"

treehouse:~/workspace$ ruby hello.rb                           
hello Jason! 

-------------

print "Please enter your name: "
name = gets
puts "hello #{name}!"

treehouse:~/workspace$ ruby hello.rb                           
Please enter your name: priss                                   
hello priss                                                    
!                                                              
treehouse:~/workspace$  

-------------


Print out your name:

name = "Jason"
puts "Hello #{name}"
Get input from the user:

name = gets
puts "Hello #{name}"
Run a Ruby program called "hello.rb":

ruby hello.rb
Prompt the user for their name:

print "Please enter your name: "
name = gets
puts "Hello #{name}"

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