Question

Using C Language
Write a program segment that computes 1 + 2 + 3 + ... + ( n - 1) + n , where n is a
data value. Follow the loop body with an if statement that compares this value to
(n * (n + 1)) / 2 and displays a message that indicates whether the values are the
same or different.

Please give me code to just copy and paste

Answer 1

#include <stdio.h>

int main() {
   //Declaring variables
int num,sum_of_nos=0,result,i;

//getting the number entered by the user
   printf("Enter the number :");
   scanf("%d",&num);   
     
   /* This for loop will calculate
   * the sum of numbers from 1 to
   * the user entered number
   */
for(i=1;i<=num;i++)
{
    //calculating the sum of numbers manually
    sum_of_nos+=i;
   }
     
   //calculaitng the sum of numbers using formula
   result=(num*(num+1))/2;
     
   /* Comparing the two results.
   * Based on that display the result
   */
   if(sum_of_nos==result)
   {
      printf("** The Values are same **");
   }
   else
   {
      printf("** The Values are not same **");
   }
  
  
   return 0;
}

__________________

output:

____________Thank YOu