C program to generate series -1 4 -7 10 -13 16........till N - My CS Tutorial

In this tutorial we will learn how to write a c program that generate the series  -1 4 -7 10 -13 16.................till N.

C program code

#include<stdio.h>

#include<conio.h>

void main()

{

 int a,b=1,terms;

 printf("\n Enter number of terms in series:\n ");

 scanf("%d",&terms);

  printf("\n ");

 for(a=1;a<=terms;a++)

 {

  if(a%2==1)

  printf("%d ",(-1*b));

  else

  printf("%d ",b);

  b+=3;

 }

 printf("\n");

 getch();

}

OUTPUT:

In this output the value of terms in series is 15

And the series is:

 -1 4 -7 10 -13 16 -19 22 -25 28 -31 34 -37 40 -43

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Created by-- HARSH CHAUHAN