Keyword
Programming language keywords are words with special meanings.
Python Example
# The keywords below are reserved and cannot be use as identifiers:
and
as
assert
async
await
break
class
continue
def
del
elif
else
except
False
finally
for
from
global
import
in
if
is
lambda
None
nonlocal
not
or
pass
raise
return
True
while
with
yield