# 💬 Output
By default, results are printed as lines to standard output.
`LF` character is used as a line terminator.
- Use `-T, --print` option to print results terminated by a specific string.
- Use `-Z, --print-nul` flag to print results terminated by `NUL` character.
- Use `-R, --print-raw` flag to print results without a terminator.
- Use `-L, --no-print-end` flag to disable printing terminator for the last result.
The following table shows how values would be printed for valid combinations of flags/options:
| `a`, `b`, `c` | *(none)* | `a\nb\nc\n` |
| `a`, `b`, `c` | `-L` | `a\nb\nc` |
| `a`, `b`, `c` | `-Z` | `a\0b\0c\0` |
| `a`, `b`, `c` | `-LZ` | `a\0b\0c` |
| `a`, `b`, `c` | `-T:` | `a:b:c:` |
| `a`, `b`, `c` | `-LT:` | `a:b:c` |
| `a`, `b`, `c` | `-R` | `abc` |
Apart from this (standard) mode, there are also two other output modes.
## 🤖 Diff mode
- Enabled using `-b, --diff` flag.
- Respects `--print*` flags/options.
- Ignores `--no-print-end` flag.
- Prints machine-readable transformations as results:
```text
<input_value_1
>output_value_1
<input_value_2
>output_value_2
...
<input_value_N
>output_value_N
```
Such output can be processed by accompanying `mvb` and `cpb` utilities to perform bulk move/copy.
```bash
find -name '*.jpeg' | rew -d '{B}.jpg' | mvb # Rename all *.jpeg files to *.jpg
find -name '*.txt' | rew -d '{}.bak' | cpb # Make backup copy of each *.txt file
```
## 🌹 Pretty mode
- Enabled using `-p, --pretty` flag.
- Ignores `--print*` flags/options.
- Ignores `--no-print-end` flag.
- Prints human-readable transformations as results:
```text
input_value_1 -> output_value_1
input_value_2 -> output_value_2
...
input_value_N -> output_value_N
```