Fix typo:  c_float represents to C float type.
diff --git a/Doc/library/ctypes.rst b/Doc/library/ctypes.rst
index 1a52a75..6c9dbf8 100644
--- a/Doc/library/ctypes.rst
+++ b/Doc/library/ctypes.rst
@@ -2069,7 +2069,7 @@
 
 .. class:: c_float
 
-   Represents the C double datatype. The constructor accepts an optional float
+   Represents the C float datatype. The constructor accepts an optional float
    initializer.