Reference Guide

Full Command and Function Reference 3-51
Input/Output:
Level 1/Argument 1 Level 1/Item 1
« program » or 'program name'
→
See also: HALT, NEXT
DDAYS
Type: Command
Description: Delta Days Command: Returns the number of days between two dates.
If the argument 1/level 2 date is chronologically later than the argument 2/ level 1 date, the result
is negative. The range of allowable dates is October 15, 1582, to December 31, 9999.
Access: …Ó TOOLS L DDAYS ( Ó is the right-shift of the 9 key).
…&9 L DDAYS
Flags: Date Format (–42)
Input/Output:
Level 2/Argument 1 Level 1/Argument 2 Level 1/Item 1
date
1
date
2
→
x
days
See also: DATE, DATE+
DEC
Type: Command
Description: Decimal Mode Command: Selects decimal base for binary integer operations. (The default base is
decimal.)
Binary integers require the prefix #. Binary integers entered and returned in decimal base
automatically show the suffix d. If the current base is not decimal, then you can enter a decimal
number by ending it with d. It will be displayed in the current base when it is entered.
The current base does not affect the internal representation of binary integers as unsigned binary
numbers.
Access: !´ BASE DEC ( ´ is the left-shift of the Pkey).
!Ú BASE DEC ( Ú is the left-shift of the 6key).
Flags: Binary Integer Wordsize (–5 through –10), Binary Integer Base (–11, –12)
Input/Output: None
See also: BIN, HEX, OCT, RCWS, STWS
DECR
Type: Command
Description: Decrement Command: Takes a variable, subtracts 1, stores the new value back into the original
variable, and returns the new value. The contents of name must be a real number or an integer.
Access: !° MEMORY ARITHMETIC DECR ( °is the left-shift of the Nkey).
Input/Output:
Level 1/Argument 1 Level 1/Item 1
'name'
→
x
new
Example 1: If 35.7 is stored in A, 'A' DECR returns 34.7 .
Example 2: The following program counts down from 100 to 0 and leaves the integers 100 to 0 on the stack:
« 100 'A' STO WHILE A REPEAT 'A' DECR END 'A' PURGE »
See also: INCR, STO+, STO–