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Can't use numexpr in horizontal mode

TeX Live 2010 and Thunderbird add-on LaTeXIt! don't cooperateTeXLive/PDFTeX fonts loading problem@ title and You can't use `spacefactor' in vertical modeHebrew TeXLive on Ubuntu 12.04 missing fontsYou can't use `eqno' in math modeTex File No Longer Found After Previously Working TexMaker & Texlive for Windows 7Using TexShop, upgraded to OS X El Capitan, and the fix isn't workingThe difference between `thenumexpr` and `numbernumexpr`You can't use `lastbox' in vertical modeinputenc: Unicode character … not set up for use with LaTeX

5

I am trying to learn to work with numexpr and am having some trouble with the basics, and etex_man has not been detailed enough to help in this case.

Here is an MWE:

documentclassarticle
begindocument
Hi numexpr 6 + 1 relax
enddocument

The error when I call pdflatex from TexLive 2018 is "You can't use `numexpr' in horizontal mode. Hi numexpr." Similar error if I switch to vertical or math mode.

So clearly I am missing something basic. Could someone enlighten me?

Thanks in advance

errors texlive e-tex

share|improve this question

asked 8 hours ago

Zach BoydZach Boyd

1656

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You might want to read Chapter 7 of TeX by Topic which explains the different number types in TeX and in what context they may occur. numexpr is added in e-TeX as a new alternative to <internal integer>. You find the extended grammar rules in the e-TeX manual.
  
  – siracusa
  7 hours ago
  

  
  
  
  

add a comment | 

5

I am trying to learn to work with numexpr and am having some trouble with the basics, and etex_man has not been detailed enough to help in this case.

Here is an MWE:

documentclassarticle
begindocument
Hi numexpr 6 + 1 relax
enddocument

The error when I call pdflatex from TexLive 2018 is "You can't use `numexpr' in horizontal mode. Hi numexpr." Similar error if I switch to vertical or math mode.

So clearly I am missing something basic. Could someone enlighten me?

Thanks in advance

errors texlive e-tex

share|improve this question

asked 8 hours ago

Zach BoydZach Boyd

1656

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You might want to read Chapter 7 of TeX by Topic which explains the different number types in TeX and in what context they may occur. numexpr is added in e-TeX as a new alternative to <internal integer>. You find the extended grammar rules in the e-TeX manual.
  
  – siracusa
  7 hours ago
  

  
  
  
  

add a comment | 

I am trying to learn to work with numexpr and am having some trouble with the basics, and etex_man has not been detailed enough to help in this case.

Here is an MWE:

documentclassarticle
begindocument
Hi numexpr 6 + 1 relax
enddocument

The error when I call pdflatex from TexLive 2018 is "You can't use `numexpr' in horizontal mode. Hi numexpr." Similar error if I switch to vertical or math mode.

So clearly I am missing something basic. Could someone enlighten me?

Thanks in advance

errors texlive e-tex

share|improve this question

asked 8 hours ago

Zach BoydZach Boyd

1656

documentclassarticle
begindocument
Hi numexpr 6 + 1 relax
enddocument

share|improve this question

asked 8 hours ago

Zach BoydZach Boyd

1656

share|improve this question

asked 8 hours ago

Zach BoydZach Boyd

1656

asked 8 hours ago

Zach BoydZach Boyd

1656

asked 8 hours ago

Zach BoydZach Boyd

1656

2 Answers
2

active

oldest

votes

7

numexpr is an additional item that can be used in contexts where TeX is looking for a <number>.

It basically is an “unnamed counter register” as far as its syntax is concerned and is not allowed “bare”.

It essentially works like countX (where countX stands for an “unreachable” count register number) after this unnamed register is loaded with the value of the expression.

So just like you can't say Hi count232 to print the value stored in count232, you cannot say

Hi numexpr 6+1relax

Just consider count232 and numexpr 6+1relax as referring to an abstract number, which exists independently of its representation. You need to access a representation of this abstract number:

Hi numbercount232

Hi romannumeralcount232

Hi numbernumexpr 6+1relax

Hi romannumeralnumexpr 6+1relax

Bare bones TeX only provides number (for the decimal representation) and romannumeral (for lowercase Roman numeral representation). Add-on packages may provide other representations.

share|improve this answer

answered 6 hours ago

egregegreg

744k8919493287

add a comment | 

6

You need number or the in front of the expression: numexpr works like a TeX count. Alternatively, you could use the xfp package to provide a thin wrapper

documentclassarticle
usepackagexfp
begindocument

numbernumexpr 1 + 2 * 3 relax

thenumexpr 1 + 2 * 3 relax

inteval1 + 2 * 3

enddocument

share|improve this answer

answered 8 hours ago

Joseph Wright♦Joseph Wright

207k24568897

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks--this certainly removed the error. Do you know why this is needed? I am not a TeX wiz, and Googling "the TeX" is unproductive...
  
  – Zach Boyd
  7 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @ZachBoyd Some commands are just not meant to be used in horizontal mode (typesetting): numexpr is just one of those.
  
  – Joseph Wright♦
  7 hours ago
  

  
  
  
  

add a comment | 

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7

numexpr is an additional item that can be used in contexts where TeX is looking for a <number>.

It basically is an “unnamed counter register” as far as its syntax is concerned and is not allowed “bare”.

It essentially works like countX (where countX stands for an “unreachable” count register number) after this unnamed register is loaded with the value of the expression.

So just like you can't say Hi count232 to print the value stored in count232, you cannot say

Hi numexpr 6+1relax

Just consider count232 and numexpr 6+1relax as referring to an abstract number, which exists independently of its representation. You need to access a representation of this abstract number:

Hi numbercount232

Hi romannumeralcount232

Hi numbernumexpr 6+1relax

Hi romannumeralnumexpr 6+1relax

Bare bones TeX only provides number (for the decimal representation) and romannumeral (for lowercase Roman numeral representation). Add-on packages may provide other representations.

share|improve this answer

answered 6 hours ago

egregegreg

744k8919493287

add a comment | 

7

numexpr is an additional item that can be used in contexts where TeX is looking for a <number>.

It basically is an “unnamed counter register” as far as its syntax is concerned and is not allowed “bare”.

It essentially works like countX (where countX stands for an “unreachable” count register number) after this unnamed register is loaded with the value of the expression.

So just like you can't say Hi count232 to print the value stored in count232, you cannot say

Hi numexpr 6+1relax

Just consider count232 and numexpr 6+1relax as referring to an abstract number, which exists independently of its representation. You need to access a representation of this abstract number:

Hi numbercount232

Hi romannumeralcount232

Hi numbernumexpr 6+1relax

Hi romannumeralnumexpr 6+1relax

Bare bones TeX only provides number (for the decimal representation) and romannumeral (for lowercase Roman numeral representation). Add-on packages may provide other representations.

share|improve this answer

answered 6 hours ago

egregegreg

744k8919493287

add a comment | 

numexpr is an additional item that can be used in contexts where TeX is looking for a <number>.

It basically is an “unnamed counter register” as far as its syntax is concerned and is not allowed “bare”.

It essentially works like countX (where countX stands for an “unreachable” count register number) after this unnamed register is loaded with the value of the expression.

So just like you can't say Hi count232 to print the value stored in count232, you cannot say

Hi numexpr 6+1relax

Just consider count232 and numexpr 6+1relax as referring to an abstract number, which exists independently of its representation. You need to access a representation of this abstract number:

Hi numbercount232

Hi romannumeralcount232

Hi numbernumexpr 6+1relax

Hi romannumeralnumexpr 6+1relax

Bare bones TeX only provides number (for the decimal representation) and romannumeral (for lowercase Roman numeral representation). Add-on packages may provide other representations.

share|improve this answer

answered 6 hours ago

egregegreg

744k8919493287

Hi numexpr 6+1relax

Hi numbercount232

Hi romannumeralcount232

Hi numbernumexpr 6+1relax

Hi romannumeralnumexpr 6+1relax

share|improve this answer

answered 6 hours ago

egregegreg

744k8919493287

answered 6 hours ago

egregegreg

744k8919493287

answered 6 hours ago

egregegreg

744k8919493287

6

You need number or the in front of the expression: numexpr works like a TeX count. Alternatively, you could use the xfp package to provide a thin wrapper

documentclassarticle
usepackagexfp
begindocument

numbernumexpr 1 + 2 * 3 relax

thenumexpr 1 + 2 * 3 relax

inteval1 + 2 * 3

enddocument

share|improve this answer

answered 8 hours ago

Joseph Wright♦Joseph Wright

207k24568897

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks--this certainly removed the error. Do you know why this is needed? I am not a TeX wiz, and Googling "the TeX" is unproductive...
  
  – Zach Boyd
  7 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @ZachBoyd Some commands are just not meant to be used in horizontal mode (typesetting): numexpr is just one of those.
  
  – Joseph Wright♦
  7 hours ago
  

  
  
  
  

add a comment | 

6

You need number or the in front of the expression: numexpr works like a TeX count. Alternatively, you could use the xfp package to provide a thin wrapper

documentclassarticle
usepackagexfp
begindocument

numbernumexpr 1 + 2 * 3 relax

thenumexpr 1 + 2 * 3 relax

inteval1 + 2 * 3

enddocument

share|improve this answer

answered 8 hours ago

Joseph Wright♦Joseph Wright

207k24568897

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks--this certainly removed the error. Do you know why this is needed? I am not a TeX wiz, and Googling "the TeX" is unproductive...
  
  – Zach Boyd
  7 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  @ZachBoyd Some commands are just not meant to be used in horizontal mode (typesetting): numexpr is just one of those.
  
  – Joseph Wright♦
  7 hours ago
  

  
  
  
  

add a comment | 

You need number or the in front of the expression: numexpr works like a TeX count. Alternatively, you could use the xfp package to provide a thin wrapper

documentclassarticle
usepackagexfp
begindocument

numbernumexpr 1 + 2 * 3 relax

thenumexpr 1 + 2 * 3 relax

inteval1 + 2 * 3

enddocument

share|improve this answer

answered 8 hours ago

Joseph Wright♦Joseph Wright

207k24568897

documentclassarticle
usepackagexfp
begindocument

numbernumexpr 1 + 2 * 3 relax

thenumexpr 1 + 2 * 3 relax

inteval1 + 2 * 3

enddocument

share|improve this answer

answered 8 hours ago

Joseph Wright♦Joseph Wright

207k24568897

answered 8 hours ago

Joseph Wright♦Joseph Wright

207k24568897

answered 8 hours ago

Joseph Wright♦Joseph Wright

207k24568897