begin (1) - Linux Man Pages
begin: start a new block of code
Synopsisbegin; [COMMANDS...;] end
DescriptionThe begin builtin is used to create a new block of code. The block is unconditionally executed. begin; ...; end is equivalent to if true; ...; end. The begin command is used to group any number of commands into a block. The reason for doing so is usually either to introduce a new variable scope, to redirect the input or output of a set of commands as a group, or to specify precedence when using the conditional commands like and.
ExampleThe following code sets a number of variables inside of a block scope. Since the variables are set inside the block and have local scope, they will be automatically deleted when the block ends.
begin set -l PIRATE Yarrr ... end # This will not output anything, since the PIRATE variable went out # of scope at the end of the block echo $PIRATE
In the following code, all output is redirected to the file out.html.
begin echo $xml_header echo $html_header if test -e $file ... end ...
end > out.html