[#BN_div_word]
= BN_div_word
:mrdocs:

Divide `a` by word `w` in place and return the remainder.

== Synopsis

Declared in `<openssl/bn.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
unsigned long
BN_div_word(
    xref:BIGNUM.adoc[BIGNUM]* a,
    unsigned long w);
----

== Return Value

Remainder, or (BN_ULONG)‐1 on error (for example `w` is 0).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| Dividend updated to the quotient (sign preserved).
| *w*
| Non‐zero divisor word.
|===


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