Reference Guide

3-178 Full Command and Function Reference
Result: 135/4
PREVPRIME
Type: Function
Description: Given an integer, finds the closest prime number smaller than the integer. Like ISPRIME?, it uses
a pseudoprime check for large numbers.
Access: Arithmetic, !Þ INTEGER L
Input: An integer or an expression that evaluates to an integer.
Output: The closest prime number smaller than the integer.
Example: Find the closest, smaller prime number to 145.
Command: PREVPRIME(145)
Result: 139
See also: ISPRIME?, NEXTPRIME
PRLCD
Type: Command
Description: Print LCD Command: Prints a pixel-by-pixel image of the current display (excluding the
annunciators).
The width of the printed image of characters in the display is narrower using PRLCD than using a
print command such as PR1. The difference results from the spacing between characters. On the
display there is a single blank column between characters, and PRLCD prints this spacing. Print
commands such as PR1 print two blank columns between adjacent characters.
Access: …µ PRLCD
Flags: I/O Device (–33), Printing Device (–34), Double-spaced Printing (–37), Linefeed (–38). Flag –38
must be clear, I/O Device for Wire (–78). If flag –34 is set, flag –33 must be clear.
Input/Output: None
Example: The command sequence ERASE DRAW PRLCD clears PICT, plots the current equation, then
prints the graphics display.
See also: CR, DELAY, OLDPRT, PRST, PRSTC, PRVAR, PR1
PROMPT
Type: Command
Description: Prompt Command: Displays the contents of “prompt” in the status area, and halts program
execution.
PROMPT is equivalent to 1 DISP 1 FREEZE HALT.
Access: !°L IN L PROMPT ( °is the left-shift of the Nkey).
Input/Output:
Level 1/Argument 1 Level 1/Item 1
“prompt”
→
See also: CONT, DISP, FREEZE, HALT, INFORM, INPUT, MSGBOX
PROMPTSTO
Type: Command
Description: Prompt Command: Creates a variable with the name supplied as an argument, prompts for a
value, and stores the value you enter in the variable.
Access: …µ PROMPTSTO