Texas Instruments TI-89 - Is_Float_Signed_Infinity

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Appendix A: System Routines — Direct Floating Point Operations
TI
-
89 / TI
-
92 Plus Developer Guide
Not for Distribution
Beta Version January 26, 2001
is_float_signed_infinity
Declaration:
Boolean
is_float_signed_infinity
(Float
f
)
Category(ies):
Direct Floating Point Operations
Description:
Determines whether
f
represents
Lˆ
or +
ˆ
.
Inputs:
f
— Float.
Outputs:
Returns TRUE if
f
represents
Lˆ
or +
ˆ
. Otherwise returns FALSE.
Assumptions:
None
Side Effects:
None
Availability:
On AMS 1.05 and higher.
TI
-
89 / TI
-
92 Plus
Differences:
None
See Also: is_float_infinity, is_nan, is_float_unsigned_inf_or_nan,
is_float_transfinite
Example:
is_float_signed_infinity (-fabs(1.0/0.0)); /* Returns TRUE */
is_float_signed_infinity (1.0/0.0); /* Returns FALSE */