Too Many Variables!

Too Many Variables! is an esolang created by squareroot12621, but you can only assign variables.

Like, seriously, that's all you can do.

Documentation

In Too Many Variables!, lines have to look like this:

<number>=<number><operation><number>

Here, <operation> can be one of +-*/—the standard four operations. However, the <number>s are different from normal numbers, since they can have leading zeroes.

Here's a chart showing how the different number formats work:

Format	Regex	Description
		Assignment	Accessing
Number with no leading zeroes	[1-9]\d*	Variable
Number with 1 leading zero	0[1-9]\d*	Literal number
000	000	Literal number 0
0	0	Print chr(<number>)	Return ord(input()[0])
00	00	Change line number; if outside program area, halt	Get line number
Anything else	00([1-9]\d*|0\d+)	Invalid—throws an error

This is pretty much the entire language.

Examples

Print Hello, World!:

1=098+09
0=063+09
0=1-06
0=1+01
0=1+01
0=1+04
0=035+09
0=023+09
0=078+09
0=1+04
0=1+07
0=1+01
0=1-07
0=024+09

Interpreters

Python interpreter (Github)

Note: This interpreter requires at least Python 3 to run.