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Which of the following is the correct ways to set a value 3.14 in a variable pi such that it cannot be modified?

float pi = 3.14F;
#define pi 3.14F;
const float pi = 3.14F;
const float pi; pi = 3.14F;
pi = 3.14F;

Correct Answer: const float pi = 3.14F;

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