.TH TRUE 1 .SH NAME true, false \- provide truth values .SH SYNOPSIS .B true .PP .B false .SH DESCRIPTION .I True\^ does nothing, successfully. .I False\^ does nothing, unsuccessfully. They are typically used in input to .IR sh (1) such as: .PP .RS while true do .RS .I command .RE done .RE .SH SEE ALSO sh(1). .SH DIAGNOSTICS .I True\^ has exit status zero, .I false\^ nonzero.