# length function
length(1)		1\n		length function
length(11)		2\n		length function
length(111)		3\n		length function

# read function
# TODO?

# scale function
scale(1)		0\n		scale function
scale(1.0)		1\n		TODO scale function
scale(1.1)		1\n		scale function
scale(1.12)		2\n		scale function
scale(1.123)		3\n		scale function

# sqrt funtion
sqrt(0)			0\n		sqrt function
sqrt(1)			1\n		sqrt function
sqrt(4)			2\n		sqrt function

# user defined functions
define thrice (n) { return (3*n); } thrice(3); 			9\n		TODO thrice function