`[Fe(CN)_(6)]^(4-)` is a coordination complex ion.
Write the IUPAC name of the complex ion.

Explanation

To write the IUPAC name of the coordination complex ion \([Fe(CN)_{6}]^{4-}\), we will follow a systematic approach based on the rules for naming coordination compounds.

### Step-by-Step Solution:

1. **Identify the Ligands**:
- The ligand in this complex is cyanide (CN). In coordination chemistry, when naming ligands, we modify the name of the ligand based on its charge. Since cyanide is an anionic ligand, we will use "cyano" as the name for it.

2. **Count the Number of Ligands**:
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