Writing comments in pseudocode, I wanted to insert comments which are not aligned to the right side of the line which is commented. This thread helped me a lot.

However, I want comments to stand above the code line to which they refer and be always left-aligned.

Reason: If the comment refers to an elsif, then the comment is inside the previous if-block. Thus, it is indented. I don't want it to be indented, I want it to be at the same horizontal position as the corresponding line is.

Starting with this

\algnewcommand{\LineComment}[1]{\State \(\triangleright\) #1}

How can I design it to be aligned corresponding to the next line (which is left-aligned in 90% of the cases)?

I am using this:

\algnewcommand{\LineComment}[1]{\State \(\triangleright\) #1}

Also, I want to define a new command, not redefine an existing one.


1 Answer 1


try inserting \hfill

\algnewcommand{\LineComment}[1]{\State  \(\triangleright\) #1 \hfill~}
  • This keeps the triangle where it is and moves the actual comment to the right end of the line..
    – bogus
    Jan 23, 2013 at 7:51
  • I just noticed that the problem description is not quite accurate: My comments are supposed to be left aligned, sorry. I updated the description
    – bogus
    Jan 23, 2013 at 7:52
  • put the \hfill before the triangle, then the \State should be left and the comment right aligned. See my edit
    – user2478
    Jan 23, 2013 at 8:13
  • this pushes the comment to the right, not to the left
    – bogus
    Jan 23, 2013 at 8:37
  • see edit, but I need a complete example to see what you resally want
    – user2478
    Jan 23, 2013 at 8:50

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