true, false and : commands
Syntax#
- true, : - always return 0 as exit code.
- false - always returns 1 as exit code.
Infinite Loop
while true; do
echo ok
doneor
while :; do
echo ok
doneor
until false; do
echo ok
doneFunction Return
function positive() {
return 0
}
function negative() {
return 1
}Code that will always/never be executed
if true; then
echo Always executed
fi
if false; then
echo Never executed
fi