Write a Java method named calculateSum that takes two integer parameters, start and end, representing the starting and ending numbers of a range, inclusive. This method should calculate and return the sum of all the numbers within the range.
Use the following method signature:
public static int calculateSum(int start, int end)
For example, if start is 1 and end is 5, the method should calculate and return the sum of the numbers 1, 2, 3, 4, and 5, which is 15.
Write the calculateSum method along with its appropriate method header and return statement in the code cell below.
Remember to include access modifiers, a valid method signature, and necessary declarations.
public class Main {
public static void main(String[] args) {
int start = 1;
int end = 5;
int sum = calculateSum(start, end);
System.out.println("The sum of numbers from " + start + " to " + end + " is: " + sum);
}
public static int calculateSum(int start, int end) {
int sum = 0;
for (int i = start; i <= end; i++) {
sum += i;
}
return sum;
}
}
The calculateSum method takes two integer parameters, start and end, representing the starting and ending numbers of the range. It initializes the sum variable to 0.
A for loop is used to iterate over each number from start to end, inclusive. The loop starts with i initialized to start, and the loop continues as long as i is less than or equal to end. After each iteration, i is incremented by 1.
Inside the loop, the value of i is added to the sum variable. This accumulates the sum of all the numbers within the range.
After the loop ends, the sum variable stores the final sum of all the numbers within the range. It is then returned by the method as the desired result.
In the given example, the main method calls the calculateSum method with start value of 1 and end value of 5. The calculated sum is stored in the sum variable and printed to the console. The output will be:
The sum of numbers from 1 to 5 is: 15