What is the purpose of a variable declaration?

The purpose of a variable declaration is to specify a variable's name and type. This process allows the programming language to allocate the appropriate amount of memory for the variable and to understand what kind of data the variable will hold, such as integers, strings, or floating-point numbers.

When a variable is declared, it provides essential information to the compiler or interpreter about how the variable can be used in the program. For example, if a variable is declared as an integer, the program knows that it can perform arithmetic operations on it. Declaring a variable also adheres to the programming language's rules, ensuring that data types are respected and that operations are valid for the data contained within the variable.

In contrast, executing the program involves running the code rather than defining its components, storing a function relates to how functions are handled rather than variable management, and creating comments serves to document code for developers but does not directly relate to the purpose of variable declarations.