From 79774aa88da73d58d5fd4da209cc5373770f8009 Mon Sep 17 00:00:00 2001
From: MITSUNARI Shigeo <herumi@nifty.com>
Date: Mon, 18 Dec 2023 14:36:47 +0900
Subject: [PATCH] [doc] description of ioMode = 2

---
 api.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/api.md b/api.md
index 173491ab..4d927487 100644
--- a/api.md
+++ b/api.md
@@ -384,6 +384,7 @@ size_t T::getStr(char *buf, size_t maxBufSize, int iMode = 0) const
 
 - write `x` to `buf` according to `ioMode`
 - `ioMode`
+  - 2 ; binary number
   - 10 ; decimal number
   - 16 ; hexadecimal number
   - `MCLBN_IO_EC_PROJ` ; output as Jacobi coordinate