Blocks

Blocks are yöctọ code surrounded by brackets, { code }.

There is also an alternative syntax when blocks are just one character, use an umlaut: ¨

These are associated with block functions, like conditionals and loops.

Block Functions

	Use	Fraction	String	List	Observations
?	{code}?	if pop   code	ibid.	ibid.	if-then
⁇	{c1}{c2}⁇	if pop   c1 else   c2	ibid.	ibid.	if-then-else
F	{code}F	a = pop for ï = 0..a-1   push ï   code	NA	pop a for ï in a   push ï   code	for/for-each loop progress variable ï can be used inside
G	{code}G	a = pop for ï = a-1..0   push ï   code	NA	pop a for ï in invert(a)   push ï   code	inverted for loop progress variable ï can be used inside
R	{code}R	a = pop repeat a   code	NA	a = pop repeat la   code	same as for but with no progress variable
W	{code}W	while pop   code	ibid.	ibid.	while loop
Y	{code}Y	a = top do   code while top≠a	ibid.	ibid.	fixed-point loop

Notes:

• A non-zero Fraction, any non-empty string, and non-empty lists are considered True
• Blocks allow internal blocks