Ruby puts command creates a new line in bash-CodePudding

When I put the final puts command in the code :

#!/usr/bin/env ruby
#Este comando cita sua idade e nome
puts "digite sua idade:"
idade = gets.to_i
puts "digite seu nome:"
nome = gets
puts "Olá #{nome}! você nasceu em #{2021-idade}"

and run it on bash, it creates a new line inside the line. how to make it to be just one line?

bash image

CodePudding user response：

The print method will continue to output on the same line.

puts will always add a new line.

There is a great reference here: https://flexiple.com/puts-vs-p-vs-print-ruby/

You can also always check the documentation:

puts - https://www.rubydoc.info/stdlib/core/IO:puts "Note that puts always uses newlines"

print- https://www.rubydoc.info/stdlib/core/IO:print

If you are worried about the input having a new line, check out gets.chomp

https://www.rubyguides.com/2019/10/ruby-chomp-gets/

puts "digite sua idade:"
idade = gets.to_i
puts "digite seu nome:"
nome = gets.chomp #<- add .chomp here to remove \n from input
puts "Olá #{nome}! você nasceu em #{2021-idade}"

CodePudding user response：

I'm assuming there's a typo in your code, and it's supposed to be:

#!/usr/bin/env ruby
#Este comando cita sua idade e nome
puts "digite sua idade:"
idade = gets.to_i
puts "digite seu nome:"
nome = gets
puts "Olá #{nome}! você nasceu em #{2021-idade}"

The newline appears after the name because gets includes the newline character, which you then interpolate into the string you're printing. You can use #chomp or #strip to remove the newine (and potentially any unwanted whitespace around the input. You can see this by calling these in irb.

irb(main):003:0> gets
hello
=> "hello\n"
irb(main):004:0> gets.chomp
hello
=> "hello"
irb(main):005:0> gets.strip
  hello
=> "hello"
irb(main):006:0>