true.1

操作系统设计与实现源码

.TH TRUE 1
.SH NAME
true, false \- exit with the value true or false
.SH SYNOPSIS
\fBtrue\fR
.br
\fBfalse\fR
.br
.de FL
.TP
\\fB\\$1\\fR
\\$2
..
.de EX
.TP 20
\\fB\\$1\\fR
# \\$2
..
.SH OPTIONS
(none)
.SH EXAMPLES
.EX "while true" "List the directory until DEL is hit"
.SH DESCRIPTION
.br
	do ls \-l
.br
	done
.PP
These commands return the value
.I true
or
.I false .
They are used for shell programming.
.SH "SEE ALSO"
.BR sh (1).