SISNAN(3)

🌸 SISNAN(3) — the "is this number even real" checker 💅

okay bestie, so this page lives in the Library Functions Manual (that's the (3) part, iykyk), and the file it documents is this whole entire path:

/home/abui...RC/sisnan.f

(she's a Fortran girlie fr fr 💜)

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✨ SYNOPSIS ✨

Functions/Subroutines

logical function SISNAN (sin)

SISNAN tests input for NaN. that's it. that's the whole vibe check 🫶

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🦋 Function/Subroutine Documentation 🦋

logical function SISNAN (real, intent(in) sin)

SISNAN tests input for NaN. no cap.

🎀 Purpose:

!>
!> SISNAN returns .TRUE. if its argument is NaN, and .FALSE.
!> otherwise.  To be replaced by the Fortran 2003 intrinsic in the
!> future.
!>

so like — it returns .TRUE. if its argument is NaN, and .FALSE. otherwise. iconic behaviour honestly. 💅

heads up bestie: this whole thing is slated to be replaced by the Fortran 2003 intrinsic in the future. so she's a legacy queen serving her purpose while she can 😭👑

🌈 Parameters

• SIN

!>          SIN is REAL
!>          Input to test for NaN.
!>

SIN is REAL. it's the input to test for NaN. give her a number, she'll tell you if it's a real one or a weird little NaN gremlin 🙈

👑 Author

• Univ. of Tennessee
• Univ. of California Berkeley
• Univ. of Colorado Denver
• NAG Ltd.

Definition at line 58 of file sisnan.f. ⭐

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💫 Author 💫

Generated automatically by Doxygen for LAPACK from the source code. (so nobody hand-wrote this one, the robot did it, and honestly? she ate 🤖✨)

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and that's the whole page, bestie!! 💖 this lil footer number is LAPACK, Version 3.12.0, and she's filed under /home/abui...RC/sisnan.f(3) — go check a NaN for me, mwah 🧚🌸