for Loop in C

Program to display Addition of 1 to 50 numbers .

#include<stdio.h>

void main()

{

  int i=1,sum=0;

  for(i=1;i<=50;i++)

  {

    sum=sum+i;

  }

  printf("\n sum of 1 to 50 numbers is : %d",sum);

     

  getchar();

}

Program to accept 20 numbers from the user & count the number of positive values,negative values & zeros.

#include<stdio.h>

void main()

{

  int i=1,no,z=0,p=0,n=0;

  for(i=1;i<=20;i++)

  {

      printf("\n Enter values:");

      scanf("%d",&no);

      if(no==0)

      {

        z++;

      }

      if(no>0)

      {

        p++;

      }

      if(no<0)

      {

       n++;

      }

 

  }

  printf("\n Zeros no is :%d",z);

  printf("\n Positive no is :%d",p);

  printf("\n Negative no is :%d",n);

 

  getchar();

}

Program to display series of 1 to 15 numbers in reverse order and display the sum of 1 to 15 numbers .

#include<stdio.h>

void main()

{

  int i=0,sum=0;

  int fno=15,sno=1;

  for(i=fno;i>=sno;i--)

  {

      printf("%d \t",i);

      sum=sum+i;

  }

  printf("\n Sum is :%d",sum);

 

  getchar();

}

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