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How to print summation of numbers in Java
Problem Description
How to print summation of numbers?
Solution
Following example demonstrates how to add first n natural numbers by using the concept of stack.
import java.io.IOException; public class AdditionStack { static int num; static int ans; static Stack theStack; public static void main(String[] args) throws IOException { num = 50; stackAddition(); System.out.println("Sum = " + ans); } public static void stackAddition() { theStack = new Stack(10000); ans = 0; while (num > 0) { theStack.push(num); --num; } while (!theStack.isEmpty()) { int newN = theStack.pop(); ans += newN; } } } class Stack { private int maxSize; private int[] data; private int top; public Stack(int s) { maxSize = s; data = new int[maxSize]; top = -1; } public void push(int p) { data[++top] = p; } public int pop() { return data[top--]; } public int peek() { return data[top]; } public boolean isEmpty() { return (top == -1); } }
Result
The above code sample will produce the following result.
Sum = 1275
The following is an another example of first n natural numbers
public class Demo { public static void main(String[] args) { int sum = 0; int n = 50; for (int i = 1; i <= n; i++) { sum = sum + i; } System.out.println("The Sum Of " + n + "is" + sum); } }
The above code sample will produce the following result.
The Sum Of 50 is 1275
java_data_structure.htm
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