Content-type: text/html Man page of true

true

Section: User Commands (1)
Index Return to Main Contents
 

NAME

true, false - Returns a standard exit value  

SYNOPSIS

true

false


 

STANDARDS

Interfaces documented on this reference page conform to industry standards as follows:

false:  XPG4, XPG4-UNIX

true:  XPG4, XPG4-UNIX

Refer to the standards(5) reference page for more information about industry standards and associated tags.
 

DESCRIPTION

The true command returns a 0 (zero) exit value. The false command returns a nonzero exit value. These commands are usually used in input to shell commands.
 

NOTES

The special built-in utility : (colon) is sometimes more efficient than the true command.
 

EXIT STATUS

[Compaq]  The nonzero value returned by the false command may vary from system to system.
 

EXAMPLES

To construct a loop in a shell procedure, enter: while true do         date
        sleep 60
done

This procedure displays the date and time once a minute. To stop it, press the Interrupt key sequence.
 

SEE ALSO

Commands:  csh(1), ksh(1), Bourne Shell sh(1b), POSIX shell sh(1p)

Standards:  standards(5)


 

Index

NAME
SYNOPSIS
STANDARDS
DESCRIPTION
NOTES
EXIT STATUS
EXAMPLES
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 02:43:02 GMT, October 02, 2010