APL objects may be given names. A name may be any sequence of characters, starting with a non-numeric character, selected from the following:
| ABCDEFGHIJKLMNOPQRSTUVWXYZ_ |
| abcdefghijklmnopqrstuvwxyz |
| ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝß |
| àáâãäåæçèéêëìíîïðñòóôõöøùúûüþ |
| 0123456789 |
| ∆⍙ |
| ⒶⒷⒸⒹⒺⒻⒼⒽⒾⒿⓀⓁⓂⓃⓄⓅⓆⓇⓈⓉⓊⓋⓌⓍⓎⓏ |
Note that using a standard Unicode font (rather than APL385 Unicode used in the table above), the last row above would appear as the circled alphabet, Ⓐ to Ⓩ.
| Legal | Illegal |
|---|---|
| THIS∆IS∆A∆NAME | BAD NAME |
| X1233 | 3+21 |
| SALES | S!H|PRICE |
| pjb_1 | 1_pjb |