Code:
#include stdio.h
#include math.h
int main()
{
int a, d, n, i, tn;
int sum = 0;
printf("Enter the first term value of the A.P. series: ");
scanf("%d", &a);
printf("Enter the total numbers in the A.P. series: ");
scanf("%d", &n);
printf("Enter the common difference of A.P. series: ");
scanf("%d", &d);
sum = (n * (2 * a + (n - 1)* d ))/ 2;
tn = a + (n - 1) * d;
printf("Sum of the A.P series is: ");
for (i = a; i <= tn; i = i + d )
{
if (i != tn)
printf("%d + ", i);
else
printf("%d = %d ", i, sum);
}
return 0;
}
Output:
Enter the first term value of the A.P. series: 1
Enter the total numbers in the A.P. series: 5
Enter the common difference of A.P. series: 2
Sum of the A.P series is: 1 + 3 + 5 + 7 + 9 = 25
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