A valid name must
- start with a letter
- continue with with a sequence letters, numbers and underscore
- not be one of the Key words.
Variable names are not case-sensitive.
| example |
comment |
| year |
ok |
| YEAR |
ok, same as year |
| y-ear |
not ok |
| 1year |
not ok |
| year1 |
ok |
| length |
not ok, is a key word |
