Overview

ANSI escape codes can be used to output bold text in the console. Please note that

• In MAC/Linux system terminal supports ANSI escape codes

• Windows Command Prompt doesn’t support it. On windows, you can install Cygwin. ANSI escape codes work on that.

Program

class String
    def bold
        "\e[1m#{self}\e[22m" 
     end
end

puts "Bold String".bold

Output