Editing Binary-coded decimal (section)

===Signed variations===
Signed decimal values may be represented in several ways. The [[COBOL]] programming language, for example, supports five zoned decimal formats, with each one encoding the numeric sign in a different way:
{| class="wikitable" style="width:95%"
|-
! style="background:#D0E0FF; width:25%"| Type
! style="background:#D0E0FF; width:55%"| Description
! style="background:#D0E0FF; width:20%"| Example
|-
| [[Signed number representations|Unsigned]]
| No sign [[nibble]]
| <code>F1 F2 <u>F</u>3</code>
|-
| Signed trailing ''(canonical format)''
| Sign nibble in the last (least significant) byte
| <code>F1 F2 <u>C</u>3</code>
|-
| Signed leading ''(overpunch)''
| Sign nibble in the first (most significant) byte
| <code><u>C</u>1 F2 F3</code>
|-
| Signed trailing separate
| Separate sign character byte (<code>'+'</code> or <code>'−'</code>) following the digit bytes
| <code>F1 F2 F3 <u>2B</u></code>
|-
| Signed leading separate
| Separate sign character byte (<code>'+'</code> or <code>'−'</code>) preceding the digit bytes
| <code><u>2B</u> F1 F2 F3</code>
|}