# @btime invisible \\mu character in REPL

**URL:** <https://discourse.julialang.org/t/btime-invisible-mu-character-in-repl/13555>\
**Category:** New to Julia\
**Created:** [August 16, 2018, 9:11am UTC](https://discourse.julialang.org/t/btime-invisible-mu-character-in-repl/13555 "2018-08-16T09:11:59Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ckoe-bccms](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ckoe-bccms/32/1816_2.png) [@ckoe-bccms](https://discourse.julialang.org/u/ckoe-bccms)\
**Post date:** [August 16, 2018, 9:11am UTC](https://discourse.julialang.org/t/btime-invisible-mu-character-in-repl/13555/1 "2018-08-16T09:11:59Z")

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Hello,

this is clearly a fonts/setup issue but …

I was using the julia 0.7.0 REPL in an xterm together with the [Inconsolata](https://en.wikipedia.org/wiki/Inconsolata) fonts. Using @btime I was confused when I suddenly got results in seconds. Copy and pasting into the discourse editor revealed that the actual units were in fact μs and not seconds. The μ was invisible in the REPL (there is a blank character field if one watches closely).

Now, while Inconsolata most probably does not contain a μ glyph at all I was wondering if the REPL should/could be able to detect this and then at least print a warning or indicate that ? Also, I am not sure what the terminal emulator and X-Server should or could do, may be there is a setting forcing font substitution I am missing.

Generally, I am a bit reserved about using UTF math symbols because of problems like this (which is probably my fault 🙂

Best regards

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**Author:** ![tk3369](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/tk3369/32/2824_2.png) [@tk3369](https://discourse.julialang.org/u/tk3369)\
**Post date:** [August 17, 2018, 1:16am UTC](https://discourse.julialang.org/t/btime-invisible-mu-character-in-repl/13555/2 "2018-08-17T01:16:43Z")

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I’m also curious what font would display more unicode characters e.g. emojis. E.g. 🐐 is shown as a question mark inside a box, for Consolas font in Windows 10.