Rewrite the fib method using iterations.Hint: To compute fib(n) without recursion, you need to obtain fib(n − 2)and fib(n − 1) first. Let f0 and f1 denote the two previous Fibonacci numbers.The current Fibonacci number would then be f0 + f1. The algorithm canbe described as follows:f0 = 0; // For fib(0)f1 = 1; // For fib(1)for (int i = 1; i <= n; i++) {currentFib = f0 + f1;f0 = f1;f1 = currentFib;}// After the loop, currentFib is fib(n)Write a test program that prompts the user to enter an index and displays itsFibonacci number.

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