HP 39gII, Руководство пользователя

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Using mathematical functions 177
XPON
Exponent of value .
XPON
( value )
Example:
XPON(123.4)
returns
2
Test functions
The test functions are logical operators that always return
either 1 ( true ) or 0 ( false ).
<
Less than. Returns 1 if true, 0 if false.
value1
<
value2
≤
Less than or equal to. Returns 1 if true, 0 if false.
value1
≤
value2
= =
Equals (logical test). Returns 1 if true, 0 if false.
value1
==
value2
≠
Not equal to. Returns 1 if true, 0 if false.
value1
≠
value2
>
Greater than. Returns 1 if true, 0 if false.
value1 > value2
≥
Greater than or equal to. Returns 1 if true, 0 if false.
value1
≥
value2
AND
Compares value1 and value2 . Returns 1 if they are both
non-zero, otherwise returns 0.
value1
AND
value2
IFTE
If expression is true, do the trueclause ; if not, do the
falseclause.
IFTE(
expression , trueclause , falseclause
)
Example:
IFTE(X>0,X
2
,X
3
)
with
x=-2
returns
-8
NOT
Returns 1 if value is zero, otherwise returns 0.
NOT
value