Which statement best describes assigning to a variable?

• A. Assigning to a variable updates the variable's value or size.
• B. Defining a variable allocates memory for it.
• C. Assigning creates memory for a new variable.
• D. Defining creates a new function.

Answer: (A)

Assignment is the act of giving a variable a new value. When you assign, you replace the current content stored in that variable’s memory with the new value, so the variable now holds the updated data. The memory for the variable is usually allocated earlier when the variable is defined, not during assignment, which is why assignment changes what’s stored rather than creating or reserving new space. In some languages, the value you assign can have a different size (for example, rebinds to a longer string), which may affect the overall storage that holds the value, but the key point is that assignment updates the variable’s content rather than creating a new variable. Defining allocates memory for the variable, creating a new variable is what happens at definition, and creating a new function is a separate operation.