Appendix A: Functions and Instructions 863
remain() MATH/Number menu
remain(
expression1
,
expression2
) ⇒
⇒⇒
⇒
expression
remain(
list1
,
list2
) ⇒
⇒⇒
⇒
list
remain(
matrix1
,
matrix2
) ⇒
⇒⇒
⇒
matrix
Returns the remainder of the first argument with
respect to the second argument as defined by the
identities:
remain(x,0) x
remain(x,y) xì yùiPart(x/y)
remain(7,0) ¸ 7
remain(7,3)
¸ 1
remain(
ë 7,3) ¸ ë 1
remain(7,
ë 3) ¸ 1
remain(
ë 7,ë 3) ¸ ë 1
remain({12,
ë 14,16},{9,7,ë 5}) ¸
{3 0 1}
As a consequence, note that remain(ì x,y)
ì
remain(x,y). The result is either zero or it has
the same sign as the first argument.
Note: See also
mod().
remain([9,ë 7;6,4],[4,3;4,ë 3]) ¸
[
1 ë 1
2 1
]
Rename CATALOG
Rename
oldVarName
,
newVarName
Renames the variable
oldVarName
as
newVarName
.
{1,2,3,4}! L1 ¸ {1,2,3,4}
Rename L1, list1
¸ Done
list1
¸ {1,2,3,4}
Request CATALOG
Request
promptString
,
, ,
,
var
[
,alphaOn/Off
]
If Request is inside a Dialog...EndDlog construct, it
creates an input box for the user to type in data. If it
is a stand-alone instruction, it creates a dialog box
for this input. In either case, if var contains a string,
it is displayed and highlighted in the input box as a
default choice. promptString must be { 20
characters.
This instruction can be stand-alone or part of a
dialog construct.
Request "Enter text",t,1
¸
The argument turned on alpha-lock in the
above example.
The optional alphaOn/Off argument can be any
expression. If it evaluates to zero, alpha-lock is set
to OFF. If it evaluates to anything other than zero,
alpha-lock is set to ON. If the optional argument is
not used, alpha-lock defaults to ON.
If more than one Request command appears within
a Dialog...EndDlog construct, the first alpha setting
is used and subsequent ones are ignored.
Request “Enter number”,n,0
The argument turned off alpha-lock in the
above example.
Return CATALOG
Return [
expression
]
Returns
expression
as the result of the function.
Use within a
Func...EndFunc block, or
Prgm...EndPrgm block.
Note: Use
Return without an argument to exit a
program.
Note: Enter the text as one long line on the
Home screen (without line breaks).
Define factoral(nn)=Func
:local answer,count:1
! answer
:For count,1,nn
:answer
ù count! answer:EndFor
:Return answer:EndFunc
¸ Done
factoral(3)
¸ 6
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