What is comment out?

Commenting out is a technique used in computer programming to exclude certain lines of code from being executed by the computer. It is typically used for a variety of reasons, such as for testing or debugging purposes, or for temporarily disabling code that may otherwise cause errors or unwanted behavior. In most programming languages, comments are indicated by special characters or symbols, such as the hash mark (#) or double forward slash (//). By placing these characters at the beginning of a line of code, the computer will ignore everything that follows them, allowing the programmer to make notes or provide context for the code without affecting its functionality. Commenting out can also be used to isolate problematic code or to temporarily remove code while working on other parts of a program.