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<H1><A NAME="SECTION007500000000000000000"></A>
<BR>
5.5 Unary arithmetic operations
</H1>
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<P>
All unary arithmetic (and bit-wise) operations have the same priority:

<P>
<dl><dd><pre class=verbatim>
u_expr:         power | "-" u_expr | "+" u_expr | "~" u_expr
</pre></dl>

<P>
The unary <tt>-</tt> (minus) operator yields the negation of its
numeric argument.
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<P>
The unary <tt>+</tt> (plus) operator yields its numeric argument
unchanged.
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<P>
The unary <tt>&nbsp;</tt> (invert) operator yields the bit-wise inversion
of its plain or long integer argument.  The bit-wise inversion of
<tt>x</tt> is defined as <tt>-(x+1)</tt>.  It only applies to integral
numbers.
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<P>
In all three cases, if the argument does not have the proper type,
a <tt class=exception>TypeError</tt> exception is raised.
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