.TH TRUE 1 "11 January 1982" .SH NAME true, false \- provide truth values .SH SYNOPSIS .B true .PP .B false .SH DESCRIPTION .I True and .I false are usually used in a Bourne shell script. They test for the appropriate status "true" or "false" before running (or failing to run) a list of commands. .SH EXAMPLE .IP .nf while true do command list done .SH "SEE ALSO" csh(1), sh(1), false(1) .SH DIAGNOSTICS .I True has exit status zero.