Ace Your C++ Skills 2025 – Rock the ‘Thinking in C++’ Challenge!

Question: 1 / 565

What is the effect of defining a local variable inside a function as const?

It's a compile-time constant

It prevents changing the variable inside the function

Defining a local variable inside a function as const prevents the variable from being changed inside the function. Option A is incorrect because a compile-time constant refers to a value that cannot be changed during compilation, not just within a function. Option C is incorrect because making the function const refers to the function itself, not the local variable inside it. Option D is incorrect because const does not ensure initialization, it only prevents reassignment.

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It makes the function const

It ensures the variable is initialized at runtime

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