What is code review?

[chinmay.sahoo]

Code review is a process of examining the source code, inorder to make the code more effective.

[TomClarke]

Code review is the process of making pieces of source code available for other developers to review, with the intention of catching bugs and design errors before the code becomes part of the product. Code revieew gramatically helps in the quality of products. By catching mistakes early, a lot of bad problems in a product can be avoided.