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AT&T UNIX™PC Unix System V Users Manual - tenox

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TRUE ( ! )<br />

NAME<br />

true, false - provide truth values<br />

SYNOPSIS<br />

true<br />

false<br />

DESCRIPTION<br />

TRUE ( ! )<br />

True does nothing, successfully. False does nothing, unsuccessfully.<br />

They are typically used in input to sh(l) such as:<br />

while true<br />

do<br />

command<br />

done<br />

The following UNIX PC files are linked to either true or false:<br />

/bin/mc68k<br />

/bin/pdplll<br />

/bin/u370<br />

/bin/u3b<br />

/bin/vax<br />

SEE ALSO<br />

sh( l).<br />

DIAGNOSTICS<br />

True has exit status zero, false nonzero.<br />

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