Can anyone give an example of recursive method, explicit method using the variable n?
Certainly! Here's an example that demonstrates both a recursive method and an explicit method using the variable n.
Recursive Method:
In this example, we will define a recursive method to calculate the sum of all positive numbers from 1 to a given number n.
```java
public static int recursiveSum(int n) {
if (n <= 0)
return 0;
else
return n + recursiveSum(n - 1);
}
```
Explanation:
- The recursiveSum method takes an integer parameter n.
- Inside the method, we check if n is less than or equal to 0. If it is, we return 0.
- If n is greater than 0, we recursively call the recursiveSum method with n-1, and add n to the result.
- This process continues until n reaches zero, at which point the recursion stops and the sum is calculated.
Explicit Method:
In this example, we will define an explicit method to calculate the square of a given number n.
```java
public static int explicitSquare(int n) {
return n * n;
}
```
Explanation:
- The explicitSquare method takes an integer parameter n.
- Inside the method, we simply multiply n by itself (n * n) and return the result.
Both methods accomplish their tasks, but the recursive method uses a recursive call to break down the problem into smaller sub-problems, while the explicit method directly performs the calculation without any recursion.