| Data Type | Format specifier |
| char | %c |
| int | %i or %d |
| float | %f |
| double | %lf or % f |
| string | %s |
| long int | %ld |
| octal | %o |
| hexadecima number | %x or %X |
- It is a special characters.
- It is always begian with % symbol.
- There are used to specify the format of data.
- It is used in input /output.