ruby - print "Enter a character" a = gets if (a == 'b') puts "b was press" end

Question

我是 Ruby 的新手。我也试过

print "Enter a character "
a = gets
if (a == "b")
  puts "b was pressed"
end

这也是

print "Enter a character "
a = gets.to_s
if (a == 'b')
  puts "b was pressed"
end

Answer 1

你错过了方法String#chomp。更改您的代码如下：

print "Enter a character "
a = gets.chomp
if (a == "b")
  puts "b was pressed"
end

现在运行您的代码：

kirti@kirti-Aspire-5733Z:~/Ruby$ ruby so.rb
Enter a character b
b was pressed
kirti@kirti-Aspire-5733Z:~/Ruby$

注意：您的代码不起作用，因为a = gets实际上是分配"b\n"给变量a，这当然不等于"b"。但是使用#chomp会\n从字符串中删除，您只需从命令提示符输入并产生预期的输出。