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26 lines
910 B
Text
26 lines
910 B
Text
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\section math math - Perform mathematics calculations
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\subsection math-synopsis Synopsis
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<tt>math EXPRESSION</tt>
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\subsection math-description Description
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\c math is used to perform mathematical calculations. It is a very
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thin wrapper for the bc program, which makes it possible to specify an
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expression from the command line without using non-standard extensions
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or a pipeline.
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For a description of the syntax supported by math, see the manual for
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the bc program. Keep in mind that parameter expansion takes place on
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any expressions before they are evaluated. This can be very useful in
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order to perform calculations involving shell variables or the
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output of command substitutions, but it also means that parenthesis
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have to be escaped.
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\subsection math-example Examples
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<code>math 1+1</code> outputs 2.
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<code>math $status-128</code> outputs the numerical exit status of the
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last command minus 128.
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