Question

1. Write a program to find the summation of the numbers from 5 to 15

Answer 1

I assume that the question is asked to find the summation of all the numbers from 5 to 15 using Java programming language.

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public class demo

{

public static void main(String args[])

{

int sum = 0;

int n = 15;

for(int i = 5; i <= n ; i++)

sum += i;

System.out.println("The sum of all natural numbers from 5 to 15 is " +sum);

}

}

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Output of the above program :

The sum of all natural from 5 to 15 is 110

Answer 2

Answer:

#include <stdio.h>  

int main()  

{ int i, j, end, isPrime, sum=0;  

/* Input upper limit from user */  

printf("Find sum of all prime between 1 to : ");  

scanf("%d", &end);  

/* Find all prime numbers between 1 to end */  

for(i=2; i<=end; i++)  

{  

/* Check if the current number i is Prime or not

Explanation: