On a typical day, a computer programmer can be involved in many different coding projects. Daily duties might include:

1. Writing and testing code for new programs. Computer programmers work closely with web and software developers to write code for new mobile applications or computer programs. In some cases, programmers might have a similar role to web designers, creating the look, feel and functionality of a new software program. Writing new code often involves a lot of trial and error. Computer programmers have strong critical thinking and problem-solving skills, and enjoy using logic to solve complex problems.
2. Updating existing programs. Programmers also create and install updates for existing software programs. An update might include a bug fix, or enhanced functionality to improve the user experience. Depending on the complexity of the update, these projects can take anywhere from a few days to several months.
3. Identifying and correcting coding errors. On a daily basis, computer programmers might assist in troubleshooting parts of a website or computer program that are not functioning correctly. Often, problems are a result of an error in the code, and a programmer can help identify and correct the mistake quickly.
4. Rewriting programs for different operating systems. Often, programmers have to rewrite code in a different languages, so that programs and applications can be compatible with different operating systems. For example, Windows and OS X programs are coded differently. Some programmers are trained to write new applications in SaaS code, which works across both operating systems.