Returns the first element of a list or string – HP 48g Graphing Calculator User Manual
Page 547
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HEAD Command:
Returns the first element of a list or string.
Level 1
Level 1
{ o d j i . . .
objn
}
"String"
^ o b J i
- +
"element^"
IFT Command:
is zero.
Executes obj if T/F
is nonzero. Discards obj if T/F
Level 2
Level 1
^ Level 1
T/F
obj
It depends!
IFTE Function:
Executes the obj
Executes the obj on
on level 1 if T/F is
level 2 if T/F is nonzero,
zero.
Level 3 Level 2 Level 1
^ Level 1
obj
t c y e
obj^
a I s e
^
It depends!
INCR Command:
Takes a variable on level 1, adds 1, stores the new
value back into the original variable, and returns the new value to
level 1.
Level 1
-
Level 1
‘name'
-
^ i n c r e m e n t
Stack Diagrams for Selected Commands H-9