[#BN_cmp]
= BN_cmp
:mrdocs:

Compare two BIGNUMs considering sign.

== Synopsis

Declared in `<openssl/bn.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
BN_cmp(
    xref:BIGNUM.adoc[BIGNUM] const* a,
    xref:BIGNUM.adoc[BIGNUM] const* b);
----

== Return Value

‐1 if a < b, 0 if equal, or 1 if a > b.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| First value (NULL treated as zero).
| *b*
| Second value (NULL treated as zero).
|===


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