pc-ip-03.c (679B)
1 /* 2 * Author: Amit Dutta (amitdutta4255@gmail.com) | Date: 05 Jan 2026 3 * Repo: https://github.com/notamitgamer/bsc 4 * License: MIT 5 */ 6 7 /* 8 * Question 3: 9 * Write a program to compute the sum of the first n terms of the series using a function: S=1-2+3-4+5-6+... 10 */ 11 12 #include <stdio.h> 13 14 int series(int); 15 16 int main() 17 { 18 int n; 19 printf("Enter the n: "); 20 scanf("%d", &n); 21 printf("\nSum of the series: %d", series(n)); 22 return 0; 23 } 24 25 int series(int n) 26 { 27 int i, result = 0; 28 for (i = 1; i <= n; i++) 29 { 30 if (i % 2 == 0) 31 { 32 result -= i; 33 } 34 else 35 { 36 result += i; 37 } 38 } 39 return result; 40 }