[#BN_clear_bit]
= BN&lowbar;clear&lowbar;bit
:mrdocs:

Clear bit `n` of BIGNUM `a&period;`

== Synopsis

Declared in `&lt;openssl&sol;bn&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
BN&lowbar;clear&lowbar;bit(
    xref:BIGNUM.adoc[BIGNUM]* a,
    int n);
----

== Return Value

1 on success, or 0 on error&period;

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| BIGNUM to modify&period;
| *n*
| Zero&hyphen;based bit index to clear&period;
|===


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