2005-09-20 21:31:55 +08:00
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\section begin begin - Start a new block of code
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\subsection begin-synopsis Synopsis
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<tt>begin; [COMMAND;...] end </tt>
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\subsection begin-description Description
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The \c begin builtin is used to create a new block of code. The block
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is unconditionally executed. Begin is equivalent to <tt>if
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true</tt>. The begin command is used to group any number of commands
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into a block. The reason for this is usually either to introduce a new
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variable scope or to redirect the input to output of this set of
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commands as a group.
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\subsection begin-example Example
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The following code sets a number of variables inside of a block
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scope. Since the variables are set inside the block and have local
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scope, they will be automatically deleted when the block ends.
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<pre>
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begin
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set -x PIRATE Yarrr
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...
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end
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# This will not output anything, since PIRATE went out of scope at the end of
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# the block and was killed
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echo $PIRATE
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</pre>
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