In computer programming, redundant code is source code or compiled code in a computer program that is unnecessary, such as: A NOP instruction might be considered to be redundant code that has been explicitly inserted to pad out the instruction stream or introduce a time delay, for example to create a timing loop by "wasting time".
The following examples are in C. The second iX*2 expression is redundant code and can be replaced by a reference to the variable iY.
Alternatively, the definition int iY = iX*2 can instead be removed.
Consider: As a consequence of using the C preprocessor, the compiler will only see the expanded form: Because the use of min/max macros is very common, modern compilers are programmed to recognize and eliminate redundancy caused by their use.
The max macro thus may not produce the intended behavior for this function.