HP 33s Scientific manual 18Operation Index

Name	Keys and Description	Page	¼
x w	Returns weighted mean of x	11–4	1
	values: (Σyixi) ⎟ Σyi.
	Displays the mean (arithmetic	11–4
	average) menu.
x<> variable	Zx exchange.	3–6
	Exchanges x with a variable.
x<>y	[x exchange y.	2–4
	Moves x to the Y–register and y to
	the X–register.
{n	Displays the "x?y" comparison	13–7
	tests menu.
x≠y	{n{≠}	13–7
	If x≠y, executes next program line;
	if x=y, skips next program line.
x≤y?	{n{≤}	13–7
	If x≤y, executes next program line;
	if x>y, skips next program line.
x<y?	{n{<}	13–7
	If x<y, executes next program line;
	if x≥y, skips next program line.
x>y?	{n{>}	13–7
	If x>y, executes next program line;
	if x≤y, skips next program line.
x≥y?	{n{≥}	13–7
	If x≥y, executes next program line;
	if x<y, skips next program line.
x=y?	{n{/}	13–7
	If x=y, executes next program line;
	if x≠y, skips next program line.
o	Displays the "x?0" comparison	13–7
	tests menu.

G–18Operation Index