What does 0a stand for?
					Category: 
					technology and computing
					web design and html
				
				
			0A (zero A) or 0-A may refer to: 0x0A, hexadecimal octet corresponding to ASCII line feed control character. 0-ary (or nullary or point-free), when a function or operation takes zero operands; see Arity.
Keeping this in view, what does %0a mean?
%0A is URL-encoding of a newline, which you would use in (obviously) URLs. &x0a; would be the HTML-encoding of the same character that you would use in HTML, but it doesn't work, for a variety of reasons. To break a line in HTML, you can use <br> tag.
| Numeric Values | Meaning | |
|---|---|---|
| Decimal | Hex | |
| 9 | 09 | Horizontal tab | 
| 10 | 0A | Line feed | 
| 11 | 0B | Vertical tab | 
Also Know, what character is %0a?
| Character Name | Char | Hex | 
|---|---|---|
| Line Feed | LF | 0A | 
| Vertical Tab | VT | 0B | 
| Form Feed | FF | 0C | 
| Carriage Return | CR | 0D | 
OA is the medical abbreviation for osteoarthritis.