# Binary String Format

It is possible to enter a sequence of the following items:

* a number in the selected radix (hexadecimal, decimal or octal)
* a string constant: `"string"`
* a Unicode string constant: `L"unicode string"`
* a question mark `?` to ignore variable bytes

The sequence must be separated by a space or a comma.

An entered number will occupy the minimal number of bytes it fits in with the restriction that the number of bytes is a power of 2 (1, 2, or 4 bytes).

Two question marks without a space between them are the same as one question mark. One question mark corresponds to one CPU byte. One CPU byte may consist of multiple octets for a wide-byte CPU, like TMS320C28.

**Example**:

```
CD 21          - bytes 0xCD, 0x21
21CD           - bytes 0xCD, 0x21 (the order depends on the endiannes)
"Hello", 0     - the null terminated string "Hello"
L"Hello"       - 'H', 0, 'e', 0, 'l', 0, 'l', 0, 'o', 0
B8 ? ? ? ? 90  - byte 0xB8, 4 bytes with any value, byte 0x90
```


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```
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```

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Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.