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This is a list of commands available in Liverpool Forth. Each commands takes a certain number of arguments from the operands stack and leaves its results on the operand stack. This is indicated in the column before and after. The | denotes the bottom of the stack.

before	command	after	description
num1	abs	num2	absolute value
num1 num2	add	sum	add two numbers
|any1 ... anyn	clear	|	discard all elements
mark any1 ... anyn	cleartomark	-	discard elements down to mark
any1 ... anyn n	copy	any1 ... anyn any1 ... anyn	duplicate n elements
num1	cos	num2	cosine of num1
|any1 ... anyn	count	|any1 ... anyn n	count elements on stack
mark any1 ... anyn	counttomark	mark any1 ... anyn n	count elements down to mark
/quote proc	def	-	define /quote as proc
num1 num2	div	quotient	divide two numbers
any	dup	any any	duplicate top element
any1 any2	exch	any2 any1	exchange top two elements
any	exec	-	execute arbitrary object
-	exit	-	exit innermost active loop
num1	floor	num2	num1 rounded downwards
init incr limit proc	for	-	execute proc ith values from init by steps of incr to limit
obj1 obj2	ge	bool	is obj1 greater or equal than obj2
obj1 obj2	gt	bool	is obj1 greater than obj2
num1 num2	idiv	quotient	integer divide
bool proc	if	-	execute proc if bool is true
bool proc1 proc2	ifelse	execute proc1 if bool is true	proc2 otherwise
anyn ... any0 n	index	anyn ... any0 anyn	duplicate arbitrary element
obj1 obj2	le	bool	is obj1 less or equal to obj2
num1	ln	num2	base e logarithm
/quote	load	proc	retreive definition of /quote
proc	loop	-	repeat proc forever
obj1 obj2	lt	bool	is obj1 less than obj2
-	mark	mark	push mark on stack
num1 num2	mod	remainder	num1 modulo num2
num1 num2	mul	product	multiply two numbers
num1	neg	num2	negative of num1
any	oprint	-	print any object to console
any	pop		discard top element
string	print	-	print string to console
-	rand	int	random integer
int proc	repeat	-	repeat proc int times
a(n-1) ... a0 n j	roll	a(j-1 mod n)... a0 a1 ... a(j mod n)	roll n elements j times
num1	round	num2	num1 rounded to nearest integer
num1	sin	num2	sine of num1
num1	sqrt	num2	square root of num1
int	srand	-	set random seed
num1 num2	sub	difference	subtract two numbers

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