Typing CO_2 easily

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I'm writing my dissertation and that involves typing a lot of $mathrm{CO_2}$. I'd like to make a macro for it that's a lot easier to type, but if I put newcommand{co2}{mathrm{CO_2}}, for example, it gives me the error that mathrm can only be used in math mode. But using newcommand{co2}{$mathrm{CO_2}$} doesn't work either.



Is there a way for me to make a macro that makes typing CO_2 easier, even if it doesn't use mathrm?






macros







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  • Welcome to TeX.SE! Can you show a short compilable tex code resulting in your issue?

    – Kurt
    1 hour ago











  • Have you tried newcommand{cotwo}{mathrm{CO_2}} see tex.stackexchange.com/questions/44545/… also tex.stackexchange.com/questions/393855/…

    – KJO
    1 hour ago


















0















I'm writing my dissertation and that involves typing a lot of $mathrm{CO_2}$. I'd like to make a macro for it that's a lot easier to type, but if I put newcommand{co2}{mathrm{CO_2}}, for example, it gives me the error that mathrm can only be used in math mode. But using newcommand{co2}{$mathrm{CO_2}$} doesn't work either.



Is there a way for me to make a macro that makes typing CO_2 easier, even if it doesn't use mathrm?






macros







share|improve this question









New contributor




Hayley is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





















  • Welcome to TeX.SE! Can you show a short compilable tex code resulting in your issue?

    – Kurt
    1 hour ago











  • Have you tried newcommand{cotwo}{mathrm{CO_2}} see tex.stackexchange.com/questions/44545/… also tex.stackexchange.com/questions/393855/…

    – KJO
    1 hour ago
















0












0








0








I'm writing my dissertation and that involves typing a lot of $mathrm{CO_2}$. I'd like to make a macro for it that's a lot easier to type, but if I put newcommand{co2}{mathrm{CO_2}}, for example, it gives me the error that mathrm can only be used in math mode. But using newcommand{co2}{$mathrm{CO_2}$} doesn't work either.



Is there a way for me to make a macro that makes typing CO_2 easier, even if it doesn't use mathrm?






macros







share|improve this question









New contributor




Hayley is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












I'm writing my dissertation and that involves typing a lot of $mathrm{CO_2}$. I'd like to make a macro for it that's a lot easier to type, but if I put newcommand{co2}{mathrm{CO_2}}, for example, it gives me the error that mathrm can only be used in math mode. But using newcommand{co2}{$mathrm{CO_2}$} doesn't work either.



Is there a way for me to make a macro that makes typing CO_2 easier, even if it doesn't use mathrm?






macros




macros






share|improve this question









New contributor




Hayley is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




Hayley is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question








edited 2 hours ago









Kurt

39.7k850164




39.7k850164






New contributor




Hayley is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 2 hours ago









HayleyHayley

1




1




New contributor




Hayley is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





Hayley is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Hayley is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.













  • Welcome to TeX.SE! Can you show a short compilable tex code resulting in your issue?

    – Kurt
    1 hour ago











  • Have you tried newcommand{cotwo}{mathrm{CO_2}} see tex.stackexchange.com/questions/44545/… also tex.stackexchange.com/questions/393855/…

    – KJO
    1 hour ago





















  • Welcome to TeX.SE! Can you show a short compilable tex code resulting in your issue?

    – Kurt
    1 hour ago











  • Have you tried newcommand{cotwo}{mathrm{CO_2}} see tex.stackexchange.com/questions/44545/… also tex.stackexchange.com/questions/393855/…

    – KJO
    1 hour ago



















Welcome to TeX.SE! Can you show a short compilable tex code resulting in your issue?

– Kurt
1 hour ago





Welcome to TeX.SE! Can you show a short compilable tex code resulting in your issue?

– Kurt
1 hour ago













Have you tried newcommand{cotwo}{mathrm{CO_2}} see tex.stackexchange.com/questions/44545/… also tex.stackexchange.com/questions/393855/…

– KJO
1 hour ago







Have you tried newcommand{cotwo}{mathrm{CO_2}} see tex.stackexchange.com/questions/44545/… also tex.stackexchange.com/questions/393855/…

– KJO
1 hour ago












2 Answers
2






active

oldest

votes


















2














You want easy?



documentclass{article}  

usepackage{chemformula}

begin{document}

ch{CO2}

end{document}





share|improve this answer
























  • Indeed, very easy. +1

    – marmot
    17 mins ago



















1














documentclass[a4paper]{article}



makeatletter

newcommandUD@exchange[2]{#2#1}%

newcommandname{}%

longdefname#1#{romannumeral0@name{#1}}%

newcommand@name[2]{%

  expandafterUD@exchangeexpandafter{csname#2endcsname}{ #1}%

}%

makeatother



% Variant 1: Via csname..endcsname define a macro whose name is CO_2



namenewcommand{CO_2}{$mathrm{CO_2}$}%



% Variant 2: Define a macro CO which as parameter text has the delimiter _2



newcommandCO{}%

defCO_2{$mathrm{CO_2}$}%



begin{document}



name{CO_2}



CO_2



end{document}


enter image description here



(I elaborated on the name-macro in my answer to the question "How to implement expandbefore, similarly to expandafter?".)






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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    2














    You want easy?



    documentclass{article}  
    
usepackage{chemformula}
    
begin{document}
    
ch{CO2}
    
end{document}





    share|improve this answer
























    • Indeed, very easy. +1

      – marmot
      17 mins ago
















    2














    You want easy?



    documentclass{article}  
    
usepackage{chemformula}
    
begin{document}
    
ch{CO2}
    
end{document}





    share|improve this answer
























    • Indeed, very easy. +1

      – marmot
      17 mins ago














    2












    2








    2







    You want easy?



    documentclass{article}  
    
usepackage{chemformula}
    
begin{document}
    
ch{CO2}
    
end{document}





    share|improve this answer













    You want easy?



    documentclass{article}  
    
usepackage{chemformula}
    
begin{document}
    
ch{CO2}
    
end{document}






    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered 49 mins ago









    John KormyloJohn Kormylo

    45.4k12570




    45.4k12570













    • Indeed, very easy. +1

      – marmot
      17 mins ago



















    • Indeed, very easy. +1

      – marmot
      17 mins ago

















    Indeed, very easy. +1

    – marmot
    17 mins ago





    Indeed, very easy. +1

    – marmot
    17 mins ago











    1














    documentclass[a4paper]{article}
    

    
makeatletter
    
newcommandUD@exchange[2]{#2#1}%
    
newcommandname{}%
    
longdefname#1#{romannumeral0@name{#1}}%
    
newcommand@name[2]{%
    
  expandafterUD@exchangeexpandafter{csname#2endcsname}{ #1}%
    
}%
    
makeatother
    

    
% Variant 1: Via csname..endcsname define a macro whose name is CO_2
    

    
namenewcommand{CO_2}{$mathrm{CO_2}$}%
    

    
% Variant 2: Define a macro CO which as parameter text has the delimiter _2
    

    
newcommandCO{}%
    
defCO_2{$mathrm{CO_2}$}%
    

    
begin{document}
    

    
name{CO_2}
    

    
CO_2
    

    
end{document}


    enter image description here



    (I elaborated on the name-macro in my answer to the question "How to implement expandbefore, similarly to expandafter?".)






    share|improve this answer




























      1














      documentclass[a4paper]{article}
      

      
makeatletter
      
newcommandUD@exchange[2]{#2#1}%
      
newcommandname{}%
      
longdefname#1#{romannumeral0@name{#1}}%
      
newcommand@name[2]{%
      
  expandafterUD@exchangeexpandafter{csname#2endcsname}{ #1}%
      
}%
      
makeatother
      

      
% Variant 1: Via csname..endcsname define a macro whose name is CO_2
      

      
namenewcommand{CO_2}{$mathrm{CO_2}$}%
      

      
% Variant 2: Define a macro CO which as parameter text has the delimiter _2
      

      
newcommandCO{}%
      
defCO_2{$mathrm{CO_2}$}%
      

      
begin{document}
      

      
name{CO_2}
      

      
CO_2
      

      
end{document}


      enter image description here



      (I elaborated on the name-macro in my answer to the question "How to implement expandbefore, similarly to expandafter?".)






      share|improve this answer


























        1












        1








        1







        documentclass[a4paper]{article}
        

        
makeatletter
        
newcommandUD@exchange[2]{#2#1}%
        
newcommandname{}%
        
longdefname#1#{romannumeral0@name{#1}}%
        
newcommand@name[2]{%
        
  expandafterUD@exchangeexpandafter{csname#2endcsname}{ #1}%
        
}%
        
makeatother
        

        
% Variant 1: Via csname..endcsname define a macro whose name is CO_2
        

        
namenewcommand{CO_2}{$mathrm{CO_2}$}%
        

        
% Variant 2: Define a macro CO which as parameter text has the delimiter _2
        

        
newcommandCO{}%
        
defCO_2{$mathrm{CO_2}$}%
        

        
begin{document}
        

        
name{CO_2}
        

        
CO_2
        

        
end{document}


        enter image description here



        (I elaborated on the name-macro in my answer to the question "How to implement expandbefore, similarly to expandafter?".)






        share|improve this answer













        documentclass[a4paper]{article}
        

        
makeatletter
        
newcommandUD@exchange[2]{#2#1}%
        
newcommandname{}%
        
longdefname#1#{romannumeral0@name{#1}}%
        
newcommand@name[2]{%
        
  expandafterUD@exchangeexpandafter{csname#2endcsname}{ #1}%
        
}%
        
makeatother
        

        
% Variant 1: Via csname..endcsname define a macro whose name is CO_2
        

        
namenewcommand{CO_2}{$mathrm{CO_2}$}%
        

        
% Variant 2: Define a macro CO which as parameter text has the delimiter _2
        

        
newcommandCO{}%
        
defCO_2{$mathrm{CO_2}$}%
        

        
begin{document}
        

        
name{CO_2}
        

        
CO_2
        

        
end{document}


        enter image description here



        (I elaborated on the name-macro in my answer to the question "How to implement expandbefore, similarly to expandafter?".)







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 52 mins ago









        Ulrich DiezUlrich Diez

        5,470619




        5,470619






















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