Introduction of C programming series

c_programingSeries.md

• Problen 1
  

white a C program to a series (1 +2+3+...........+ n)

#include<stdio.h>
int main()
{
    int n ,sum=0,i;
    printf("Enter The last number :");
    scanf("%11d",&n);

    for(i=1;i<=n;i++)
    {
        sum=sum+i;
        printf("%d + ",i);
    }
printf(" \nsum = %d",sum);

}

---

#include<stdio.h>
int main()
{
    int n,a=1,sum=0;
    printf("Enter the last Number" );
    scanf("%d",&n);

    while(a<=n)
    {
    printf("%d +",a);
       sum=sum+a;
        a =a+2;
    }
      printf(" \n %d ",sum);

}

---

• Problen 2
  

white a C program to a series (1.2 +2.3+3.4+...........+ n1.n2)

#include<stdio.h>
int main()
{
    int n1,n2,sum=0,a=1,b=2;

    printf("Enter n1 and n2");
    scanf("%d",&n1);
    while(a<=n1 && b<=n2)
    {
        printf("%d.%d+ ", a,b);
        sum = sum+a*b;
        a=a+1;
        b=b+1;

    }
    printf("\n sum = %d",sum);
}

---

• Problen 3
  

white a C program to a series ( Even or odd )

#include<stdio.h>
int main()
{
    int sum =0, num, i;

    printf("Enter last Number ");
    scanf("%d",&num);
    for (i=2;i<=num;i=i+2)
    {   printf("%d ",i);
        sum = sum+i;
    }
    printf(" \n sum = %d",sum);
}

---

#include<stdio.h>
int main()
{
    int sum =0, num, i;

    printf("Enter last Number ");
    scanf("%d",&num);
    for (i=2;i<=num;i=i+2)
    {   printf("%d ",i);
        sum = sum+i;
    }
    printf(" \n sum = %d",sum);  

---

• Problen 4
  

white a C program to a series ( 1.5 + 2.5+3.5+........... + n.5 )

#include<stdio.h>
int main()
{
    float sum =0, num,i;

    printf("Enter last Number ");
    scanf("%f",&num);
    for (i=1.5;i<=num;i++)
    {
         printf("%.2f+ ",i);
        sum = sum+i;
    }
    printf(" \n sum = %.2f",sum);
}

---

• Problen 5
  

white a C program to a series (1^2 +2^2+3^2+4^2 .........n^2 )

#include<stdio.h>
int main()
{
    int sum =0, num,i;

    printf("Enter last Number ");
    scanf("%d",&num);
    for (i=1.5;i<=num;i++)
    {
         printf("%d  ",i);
        sum = sum+i*i;
    }
    printf(" \n sum = %d",sum);
}

---

• Problen 6
  

white a C program to a series (// 1+1/2+1/3+1/4 ......1/n )

#include<stdio.h>
int main()
{
    double sum =0,n,i;
    printf("Enter last Value " );
    scanf("%lf",&n);

    for (i=1;i<=n;i++)
    {
        sum=sum+(1/i);
        if( i==1)
            printf("\n 1 + ");
        else if (i==n)
            printf("(1/%lf)",i);
        else
            printf("(1/%lf)+ ",i);
    }
    printf("\n%lf",sum);
}

---

• Problen 7

white a C program to a series (1X2X3X4......n )

#include<stdio.h>
int main()
{
    int n,mul=1,i;
    printf("Enter lat Number : ");
    scanf("%d",&n);

    for(i=1;i<=n;i++)
    {
        if(i==1)
            printf("1 X ");
        else if(i == n)
            printf(" %d",i);
        else
            printf("%d X ",i);

        mul=mul*i;
    }
    printf(" \n%d",mul);

}

---

• Problen 8

white a C program to a series ( 1^2 X 2^2 X 3^2 X 4^2......n )

#include<stdio.h>
int main()
{
    int n,mul=1,i;
    printf("Enter lat Number : ");
    scanf("%d",&n);

    for(i=1;i<=n;i++)
    {
        if(i==1)
            printf("1 X ");
        else if(i == n)
            printf(" %d",i);
        else
            printf("%d X ",i);

        mul=mul*i*i;
    }
    printf(" \n%d",mul);

}

---

• Problen 9

white a C program to a series ( 1-2+3-4+5-6...n )

#include<stdio.h>
int main()
{
    int n,i,even=0,odd=0;
    printf("Enter the last number :");
    scanf("%d",&n);
    for (i=1;i<=n;i++)
        {
            if(i%2==0)
                even=even+i;

            else
            odd=odd+i;

        }
        printf(" \n %d",odd-even);
}

---

• Problen 9

white a C program to a Fibonacci series

#include<stdio.h>
int main()
{
    int first=0, second=2,count=0,fibo,n;
    printf("Enter range :");
    scanf("%d",&n);
    while (count<n)
    {
     if (count<=1)
    {
        fibo= count;
     }
     else
    {
     fibo = first+second;
     first=second;
     second=fibo;

     }
     printf("%d ",fibo);
     count++;
    }
}