The purpose is to help the programmer navigate through the code and also spot any improper matching, which would cause the program to not compile or malfunction.
If a closing bracket is left out, for instance, the compiler will not know that the end of a block of code has been reached.
[4] IntelliJ IDEA's Ruby on Rails plugin also enables bracket matching.
[6] The Microsoft Excel 2003 formula bar has parentheses matching.
Its implementation shows all the pairs of parentheses as different colors, so it is possible to easily analyze them all at once.