# bson_append_null()

## Synopsis

    bool
    bson_append_null (bson_t     *bson,
                      const char *key,
                      int         key_length);

## Parameters

bson | A bson_t.
key | An ASCII C string containing the name of the field.
key_length | The length of key in bytes, or -1 to determine the length with strlen().

## Description

The bson_append_null() function shall append a new element to bson of type BSON_TYPE_NULL.

## Returns

true if the operation was applied successfully, otherwise false and bson should be discarded.