| Specifier | Description |
| %d | Signed decimal string. |
| %u | Unsigned decimal string. |
| %i | Signed decimal string. |
| %x | Unsigned hexadecimal string. |
| %c | Character format specifier. |
| %s | String format specifier. |
| %f | Signed decimal string of the form xx.yyy. |
| %p | Formats a pointer to an address. |
| %n | Number of bytes written so far. |
| %% | Just inserts %. |