Recursion to Iteration Conversion

Question

Which, if any, of the following changes to mystery2 is required so that the two methods work as intended?
Consider the following two methods, which are intended to return the same values when they are called with the same positive integer parameter `n`.

```java
public static int mystery1(int n)
{
    if (n > 1)
    {
        return 5 + mystery1(n - 1);
    }
    else
    {
        return 1;
    }
}
```

```java
public static int mystery2(int n)
{
    int total = 0;
    int x = 1;
    while (x < n)
    {
        total += 5;
        x++;
    }
    return total;
}
```

Which, if any, of the following changes to `mystery2` is required so that the two methods work as intended?

Accepted Answer

The variable `total` should be initialized to `1`.

Answer

The variable `x` should be initialized to `0`.

Answer

The condition in the `while` loop header should be `x < n - 1`.

Answer

No change is required; the methods, as currently written, return the same values when they are called with the same positive integer parameter `n`.

Rank	User	Correct Count	Attempt Count	Time	Score
#1	singhris000	1	2	1m 29s	1
#2	bommasam000	1	2	1m 58s	-28
#3	richa.tuli	1	2	5m 50s	-260

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