Maxima 5.39.0 Manual: 55. engineering-format

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# 55. engineering-format

Engineering-format changes the way maxima outputs floating-point numbers to the notation engineers are used to: `a*10^b` with `b` dividable by three.

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## 55.1 Functions and Variables for engineering-format

Option variable: engineering_format_floats

  Default value: `true`

  This variable allows to temporarily switch off engineering-format.

      (%i1) load("engineering-format");
      (%o1)
          /maxima/share/contrib/engineering-format.lisp
      (%i2) float(sin(10)/10000);
      (%o2)                - 54.40211108893698e-6
      (%i3) engineering_format_floats:false$
      (%i4) float(sin(10)/10000);
      (%o4)                - 5.440211108893698e-5

  See also `fpprintprec` and `float`.

  ·

  @ref{Category: Display functions} · @ref{Category: Global flags} · @ref{Category: Share packages}

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## 55.2 Known Bugs

The output routine of SBCL 1.3.0 has a bug that sometimes causes the exponent not to be dividable by three. The value of the displayed number is still valid in this case.

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