How does a constant differ from a variable?

A constant is defined as a value that, once it is assigned or initialized in a program, cannot be changed throughout the execution of that program. This characteristic distinguishes constants from variables, which can hold values that may change over time as the program runs. For instance, in programming, if you declare a constant for the maximum number of items in an inventory, that value remains fixed, providing stability and predictability in your code.

The concept of constants enhances code readability and prevents accidental modifications, making it easier for programmers to understand the logic and flow of the program. Constants are particularly useful for defining fixed values like mathematical constants (e.g., π), configuration settings, or other values that are not meant to change during program execution. This leads to fewer bugs and logical errors since the programmer can be assured that the constant will retain its defined value.

In contrast, other options suggest notions that are not true regarding constants. For instance, defining a constant as more flexible than a variable contradicts their very nature, as constants are inherently rigid in their values. Additionally, the incorrect option stating that constants can be changed during execution goes against the very principle of what a constant is. Lastly, being initialized with zero is not a defining characteristic of constants, as they can