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nan(2): document isInf(x, 0) matching +∞ and -∞

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kvik 2021-02-18 21:40:30 +01:00
parent ca1542a199
commit 1ce6f0f2ab
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sys/man/2/nan
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@ -45,7 +45,9 @@ is greater than or equal to zero,
else negative infinity.
.I IsInf
returns true if its first argument is infinity
with the same sign as the second argument.
with a sign matching the second argument.
A zero sign matches both negative and positive
infinities.
.SH SOURCE
.B /sys/src/libc/port/nan.c
.SH "SEE ALSO"