How to newcommand hspace?












2















None of my newcommand declarations work for hspace, with or without arguments; I use the latest MathJax with the general libraries. Attempts so far:



newcommand{hs}[1]{hspace{#1}}
newcommand{hs}[1]{hspace{{#1}}}
newcommand{hs}[1]{hspace{{#1}px}}
newcommand{hs1}{hspace{10px}}


Have a pageful of other newcommand declarations that work just fine, unsure what's failing here. Any remedy?










share|improve this question







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  • 3





    Welcome to TeX.SE! The command name has to be preceded by a backslash: newcommand{hs}[1]{hspace{#1}}. Add a backslash and it will work. The and third versions add braces that shouldn't be there, so they won't work. The fourth version won't work because numbers can't be in command names, and the first optional argument to newcommand can't be empty.

    – Phelype Oleinik
    3 hours ago













  • Note that mathjax is not LaTeX so you should probably not expect any newcommand to work.

    – daleif
    3 hours ago











  • @daleif newcommand works in MathJax.

    – egreg
    2 hours ago











  • @PhelypeOleinik Excellent, it works - thanks. Feel free to post your response as an answer if you'd like the answer credit.

    – OverLordGoldDragon
    2 hours ago











  • @egreg out of the box with no extra configuration?

    – daleif
    2 hours ago
















2















None of my newcommand declarations work for hspace, with or without arguments; I use the latest MathJax with the general libraries. Attempts so far:



newcommand{hs}[1]{hspace{#1}}
newcommand{hs}[1]{hspace{{#1}}}
newcommand{hs}[1]{hspace{{#1}px}}
newcommand{hs1}{hspace{10px}}


Have a pageful of other newcommand declarations that work just fine, unsure what's failing here. Any remedy?










share|improve this question







New contributor




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
















  • 3





    Welcome to TeX.SE! The command name has to be preceded by a backslash: newcommand{hs}[1]{hspace{#1}}. Add a backslash and it will work. The and third versions add braces that shouldn't be there, so they won't work. The fourth version won't work because numbers can't be in command names, and the first optional argument to newcommand can't be empty.

    – Phelype Oleinik
    3 hours ago













  • Note that mathjax is not LaTeX so you should probably not expect any newcommand to work.

    – daleif
    3 hours ago











  • @daleif newcommand works in MathJax.

    – egreg
    2 hours ago











  • @PhelypeOleinik Excellent, it works - thanks. Feel free to post your response as an answer if you'd like the answer credit.

    – OverLordGoldDragon
    2 hours ago











  • @egreg out of the box with no extra configuration?

    – daleif
    2 hours ago














2












2








2








None of my newcommand declarations work for hspace, with or without arguments; I use the latest MathJax with the general libraries. Attempts so far:



newcommand{hs}[1]{hspace{#1}}
newcommand{hs}[1]{hspace{{#1}}}
newcommand{hs}[1]{hspace{{#1}px}}
newcommand{hs1}{hspace{10px}}


Have a pageful of other newcommand declarations that work just fine, unsure what's failing here. Any remedy?










share|improve this question







New contributor




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












None of my newcommand declarations work for hspace, with or without arguments; I use the latest MathJax with the general libraries. Attempts so far:



newcommand{hs}[1]{hspace{#1}}
newcommand{hs}[1]{hspace{{#1}}}
newcommand{hs}[1]{hspace{{#1}px}}
newcommand{hs1}{hspace{10px}}


Have a pageful of other newcommand declarations that work just fine, unsure what's failing here. Any remedy?







spacing macros mathjax






share|improve this question







New contributor




OverLordGoldDragon 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




OverLordGoldDragon 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






New contributor




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









asked 3 hours ago









OverLordGoldDragonOverLordGoldDragon

132




132




New contributor




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





New contributor





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






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








  • 3





    Welcome to TeX.SE! The command name has to be preceded by a backslash: newcommand{hs}[1]{hspace{#1}}. Add a backslash and it will work. The and third versions add braces that shouldn't be there, so they won't work. The fourth version won't work because numbers can't be in command names, and the first optional argument to newcommand can't be empty.

    – Phelype Oleinik
    3 hours ago













  • Note that mathjax is not LaTeX so you should probably not expect any newcommand to work.

    – daleif
    3 hours ago











  • @daleif newcommand works in MathJax.

    – egreg
    2 hours ago











  • @PhelypeOleinik Excellent, it works - thanks. Feel free to post your response as an answer if you'd like the answer credit.

    – OverLordGoldDragon
    2 hours ago











  • @egreg out of the box with no extra configuration?

    – daleif
    2 hours ago














  • 3





    Welcome to TeX.SE! The command name has to be preceded by a backslash: newcommand{hs}[1]{hspace{#1}}. Add a backslash and it will work. The and third versions add braces that shouldn't be there, so they won't work. The fourth version won't work because numbers can't be in command names, and the first optional argument to newcommand can't be empty.

    – Phelype Oleinik
    3 hours ago













  • Note that mathjax is not LaTeX so you should probably not expect any newcommand to work.

    – daleif
    3 hours ago











  • @daleif newcommand works in MathJax.

    – egreg
    2 hours ago











  • @PhelypeOleinik Excellent, it works - thanks. Feel free to post your response as an answer if you'd like the answer credit.

    – OverLordGoldDragon
    2 hours ago











  • @egreg out of the box with no extra configuration?

    – daleif
    2 hours ago








3




3





Welcome to TeX.SE! The command name has to be preceded by a backslash: newcommand{hs}[1]{hspace{#1}}. Add a backslash and it will work. The and third versions add braces that shouldn't be there, so they won't work. The fourth version won't work because numbers can't be in command names, and the first optional argument to newcommand can't be empty.

– Phelype Oleinik
3 hours ago







Welcome to TeX.SE! The command name has to be preceded by a backslash: newcommand{hs}[1]{hspace{#1}}. Add a backslash and it will work. The and third versions add braces that shouldn't be there, so they won't work. The fourth version won't work because numbers can't be in command names, and the first optional argument to newcommand can't be empty.

– Phelype Oleinik
3 hours ago















Note that mathjax is not LaTeX so you should probably not expect any newcommand to work.

– daleif
3 hours ago





Note that mathjax is not LaTeX so you should probably not expect any newcommand to work.

– daleif
3 hours ago













@daleif newcommand works in MathJax.

– egreg
2 hours ago





@daleif newcommand works in MathJax.

– egreg
2 hours ago













@PhelypeOleinik Excellent, it works - thanks. Feel free to post your response as an answer if you'd like the answer credit.

– OverLordGoldDragon
2 hours ago





@PhelypeOleinik Excellent, it works - thanks. Feel free to post your response as an answer if you'd like the answer credit.

– OverLordGoldDragon
2 hours ago













@egreg out of the box with no extra configuration?

– daleif
2 hours ago





@egreg out of the box with no extra configuration?

– daleif
2 hours ago










1 Answer
1






active

oldest

votes


















5














In usual conditions, all commands in TeX must be preceded by a backslash, to tell TeX that they are commands, so instead of



newcommand{hs}[1]{hspace{#1}}


you need



newcommand{hs}[1]{hspace{#1}}


which will work as you expect.



Side note: If you just want to create a copy of a command with another name, you can use let: leths=hspace. With the newcommand approach the hs command will use hspace, and with the let approach it will be a copy of hspace. One advantage of the latter is that hs*{argument} will work as you'd expect. With newcommand it won't.



The second version adds an extra pair of braces that shouldn't be there, so it won't work as well.



hspace{{1cm}} will expand to hskip{#1}relax, which isn't valid syntax and will throw you a Missing number error.



The third version is the same. The unit will only appear after the Missing number error, so it is of no use there. Besides, TeX doesn't know the unit px, so even if you remove the braces you'll still get a Illegal unit of measure.



The fourth contains, besides the illegal px unit, two problems. The first is that in usual circumstances numbers aren't allowed in command names, so you can't use hs1. The second is that the first optional argument of newcommand (the number of arguments) must not be empty (). An empty argument is very different from a missing argument! If you try to do that (after removing the number from the command name) you'll get another Missing number error because LaTeX was expecting a number there.






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    1 Answer
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    1 Answer
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    active

    oldest

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    oldest

    votes






    active

    oldest

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    5














    In usual conditions, all commands in TeX must be preceded by a backslash, to tell TeX that they are commands, so instead of



    newcommand{hs}[1]{hspace{#1}}


    you need



    newcommand{hs}[1]{hspace{#1}}


    which will work as you expect.



    Side note: If you just want to create a copy of a command with another name, you can use let: leths=hspace. With the newcommand approach the hs command will use hspace, and with the let approach it will be a copy of hspace. One advantage of the latter is that hs*{argument} will work as you'd expect. With newcommand it won't.



    The second version adds an extra pair of braces that shouldn't be there, so it won't work as well.



    hspace{{1cm}} will expand to hskip{#1}relax, which isn't valid syntax and will throw you a Missing number error.



    The third version is the same. The unit will only appear after the Missing number error, so it is of no use there. Besides, TeX doesn't know the unit px, so even if you remove the braces you'll still get a Illegal unit of measure.



    The fourth contains, besides the illegal px unit, two problems. The first is that in usual circumstances numbers aren't allowed in command names, so you can't use hs1. The second is that the first optional argument of newcommand (the number of arguments) must not be empty (). An empty argument is very different from a missing argument! If you try to do that (after removing the number from the command name) you'll get another Missing number error because LaTeX was expecting a number there.






    share|improve this answer




























      5














      In usual conditions, all commands in TeX must be preceded by a backslash, to tell TeX that they are commands, so instead of



      newcommand{hs}[1]{hspace{#1}}


      you need



      newcommand{hs}[1]{hspace{#1}}


      which will work as you expect.



      Side note: If you just want to create a copy of a command with another name, you can use let: leths=hspace. With the newcommand approach the hs command will use hspace, and with the let approach it will be a copy of hspace. One advantage of the latter is that hs*{argument} will work as you'd expect. With newcommand it won't.



      The second version adds an extra pair of braces that shouldn't be there, so it won't work as well.



      hspace{{1cm}} will expand to hskip{#1}relax, which isn't valid syntax and will throw you a Missing number error.



      The third version is the same. The unit will only appear after the Missing number error, so it is of no use there. Besides, TeX doesn't know the unit px, so even if you remove the braces you'll still get a Illegal unit of measure.



      The fourth contains, besides the illegal px unit, two problems. The first is that in usual circumstances numbers aren't allowed in command names, so you can't use hs1. The second is that the first optional argument of newcommand (the number of arguments) must not be empty (). An empty argument is very different from a missing argument! If you try to do that (after removing the number from the command name) you'll get another Missing number error because LaTeX was expecting a number there.






      share|improve this answer


























        5












        5








        5







        In usual conditions, all commands in TeX must be preceded by a backslash, to tell TeX that they are commands, so instead of



        newcommand{hs}[1]{hspace{#1}}


        you need



        newcommand{hs}[1]{hspace{#1}}


        which will work as you expect.



        Side note: If you just want to create a copy of a command with another name, you can use let: leths=hspace. With the newcommand approach the hs command will use hspace, and with the let approach it will be a copy of hspace. One advantage of the latter is that hs*{argument} will work as you'd expect. With newcommand it won't.



        The second version adds an extra pair of braces that shouldn't be there, so it won't work as well.



        hspace{{1cm}} will expand to hskip{#1}relax, which isn't valid syntax and will throw you a Missing number error.



        The third version is the same. The unit will only appear after the Missing number error, so it is of no use there. Besides, TeX doesn't know the unit px, so even if you remove the braces you'll still get a Illegal unit of measure.



        The fourth contains, besides the illegal px unit, two problems. The first is that in usual circumstances numbers aren't allowed in command names, so you can't use hs1. The second is that the first optional argument of newcommand (the number of arguments) must not be empty (). An empty argument is very different from a missing argument! If you try to do that (after removing the number from the command name) you'll get another Missing number error because LaTeX was expecting a number there.






        share|improve this answer













        In usual conditions, all commands in TeX must be preceded by a backslash, to tell TeX that they are commands, so instead of



        newcommand{hs}[1]{hspace{#1}}


        you need



        newcommand{hs}[1]{hspace{#1}}


        which will work as you expect.



        Side note: If you just want to create a copy of a command with another name, you can use let: leths=hspace. With the newcommand approach the hs command will use hspace, and with the let approach it will be a copy of hspace. One advantage of the latter is that hs*{argument} will work as you'd expect. With newcommand it won't.



        The second version adds an extra pair of braces that shouldn't be there, so it won't work as well.



        hspace{{1cm}} will expand to hskip{#1}relax, which isn't valid syntax and will throw you a Missing number error.



        The third version is the same. The unit will only appear after the Missing number error, so it is of no use there. Besides, TeX doesn't know the unit px, so even if you remove the braces you'll still get a Illegal unit of measure.



        The fourth contains, besides the illegal px unit, two problems. The first is that in usual circumstances numbers aren't allowed in command names, so you can't use hs1. The second is that the first optional argument of newcommand (the number of arguments) must not be empty (). An empty argument is very different from a missing argument! If you try to do that (after removing the number from the command name) you'll get another Missing number error because LaTeX was expecting a number there.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 2 hours ago









        Phelype OleinikPhelype Oleinik

        21.9k54381




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