Answered! Write the code needed so pi, is used throughout a C source file to represent the math constant 3.14 without declaring…

#include <stdio.h>   // Needed to use IO functions
 
int main() {
   int sumOdd  = 0; // For accumulating odd numbers, init to 0
   int sumEven = 0; // For accumulating even numbers, init to 0
   int upperbound;  // Sum from 1 to this upperbound
   int absDiff;     // The absolute difference between the two sums
 
   // Prompt user for an upperbound
   printf("Enter the upperbound: ");
   scanf("%d", &upperbound);   // Use %d to read an int
 
   // Use a while-loop to repeatedly add 1, 2, 3,..., to the upperbound
   int number = 1;
   while (number <= upperbound) {
      if (number % 2 == 0) {  // Even number
         sumEven += number;   // Add number into sumEven
      } else {                // Odd number
         sumOdd += number;    // Add number into sumOdd
      }
      ++number; // increment number by 1
   }
 
   // Compute the absolute difference between the two sums
   if (sumOdd > sumEven) {
      absDiff = sumOdd - sumEven;
   } else {
      absDiff = sumEven - sumOdd;
   }
 
   // Print the results
   printf("The sum of odd numbers is %d.n", sumOdd);
   printf("The sum of even numbers is %d.n", sumEven);
   printf("The absolute difference is %d.n", absDiff);
 
   return 0;
}