1# length function
2length(1)		1\n		length function
3length(11)		2\n		length function
4length(111)		3\n		length function
5length(abc)		1\n		abc isn't last - TT161
6
7# read function
8# TODO?
9
10# scale function
11scale(1)		0\n		scale function
12scale(1.0)		1\n		TODO scale function
13scale(1.1)		1\n		scale function
14scale(1.12)		2\n		scale function
15scale(1.123)		3\n		scale function
16
17# sqrt funtion
18sqrt(0)			0\n		sqrt function
19sqrt(1)			1\n		sqrt function
20sqrt(4)			2\n		sqrt function
21
22# user defined functions
23define thrice (n) { return (3*n); } thrice(3); 			9\n		TODO thrice function
24