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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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2007-08-02 01:35:24 +08:00
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math is used to perform mathematical calculations. It is only a very
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thin wrapper for the bc program, that 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. Simply use a command like <code>math 1+1</code>.
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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 environment 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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