Main Page | See live article | Alphabetical index In mathematics the Right Hand Side (RHS) is everything on the right side of a test operator in an expression. Conversively the Left Hand Side (LHS) is everything on the left side. Some examples: In 2a + 5 = a/3, a/3 is the RHS. In x <= 10, 10 is the RHS. See Also: Equal sign, operator This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.