Series Display,Sum

Q. Write a C program to display the given number series and calculate sum of that series.

1  2  4  7  11  16  22 . . . . . . . . .n

Ans.

/*program to display the given series and calculating sum*/
#include<stdio.h>
#include<conio.h>
int main()
{
 int i,n;
 int sum=0,ser=1;
 printf("Enter total elements in the series:");
 scanf("%d",&n);
 for(i=1; i<=n; i++)
 {
    printf(" %d",ser);
    sum=sum+ser;
    ser=ser+i;
 }
 printf("\nSum of series = %d",sum);
 getch();
 return 0;
}

Output:-
Enter number of elements in the series : 7

 1  2  4  7  11  16  22
 Sum of series = 63

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