Star Programming 7

Introduction

Hi guys, today I will show you how to write a basic star programming in C#, this is generally helpful to the fresher and whoever preparing for interviews.

My previous article was Star Programming 6

static void Main(string[] args) {     Console.WriteLine("Please Enter a number");     int num = Convert.ToInt32(Console.ReadLine());     for (int i = num; i>0; i--)     {         for (int k = i; k < num; k++)         {             Console.Write(" ");         }         for (int j = 0; j < i; j++)         {             Console.Write("*");         }         Console.WriteLine();     } }

Star Programming 6

Introduction

Hi guys, today I will post how to write a basic star programming in C#, this is generally helpful to the fresher and whoever preparing for interviews.

My previous article was Star Programming 5

static void Main(string[] args) {     Console.WriteLine("Please Enter a number");     int num = Convert.ToInt32(Console.ReadLine());     for (int i = 0; i < num; i++)     {         for (int k = num-1; k > i; k--)         {             Console.Write(" ");         }         for (int j = 0; j <= i; j++)         {             Console.Write("*");         }         Console.WriteLine();     } }

Star Programming 5

Introduction

Hi guys, today I will post how to write a basic star programming in C#, this is generally helpful to the fresher and whoever preparing for interviews.

My previous post was Star Programming 5 

static void Main(string[] args) {     Console.WriteLine("Please Enter a number");     int num = Convert.ToInt32(Console.ReadLine());     for (int i = 0; i < num; i++)     {         for (int j = 0; j < i; j++)         {             if ((i + j) % 2 == 0)                 Console.Write("0");             else                 Console.Write("1");         }         Console.WriteLine();     } }

Star Programming 4

Introduction

Hi guys, today I will post how to write a basic star programming in C#, this is generally helpful to the fresher and whoever preparing for interviews.

My previous post was Star Programming 3

static void Main(string[] args) {     Console.WriteLine("Please Enter a number");     int num = Convert.ToInt32(Console.ReadLine());     for (int i = num; i > 0; i--)     {         for (int j = 0; j < i; j++)         {             Console.Write("*");         }         Console.WriteLine();     } }

Star Programming 3

Introduction

Hi guys, today I will post how to write a basic star programming in C#, this is generally helpful to the fresher and whoever preparing for interviews.

My previous post was Star Programming 2

static void Main(string[] args) {     Console.WriteLine("Please Enter a number");     int num = Convert.ToInt32(Console.ReadLine());     for (int i = num; i>0; i--)     {         for (int k = num - i; k > 0; k--)         {             Console.Write(" ");         }         for (int j = 2*i-1; j>0; j--)         {             Console.Write("*");         }         Console.WriteLine();     } }

Star Programming 2

Introduction

Hi guys, today I will post how to write a basic star programming in C#, this is generally helpful to the fresher and whoever preparing for interviews.

Previously I had posted   Star Programming 1        

static void Main(string[] args) {     Console.WriteLine("Please Enter a number");     int num = Convert.ToInt32(Console.ReadLine());     for (int i = 0; i < num; i++)     {         for (int k = 0; k < num - i-1; k++)         {             Console.Write(" ");         }         for (int j = 0; j <2 * i + 1; j++)         {             Console.Write("*");         }         Console.WriteLine();     } }

Star Programming 1

Introduction

Hi guys, today I will post how to write a basic star programming in C#, this is generally helpful to the fresher and whoever preparing for interviews. Slowly I will post more Star Programming related articles.

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static void Main(string[] args) {     Console.WriteLine("Enter a number");     int num = Convert.ToInt32(Console.ReadLine());     for (int i = 0; i < num; i++)     {        for (int j = 0; j <= i; j++)        {            Console.Write("*");        }        Console.WriteLine();     } }

Project Euler #2: Even Fibonacci numbers

Hi folks, today I will show you how to solve Project Euler Problem 2.

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:

1,2,3,5,8,13,21,34,55,89,⋯

By considering the terms in the Fibonacci sequence whose values do not exceed N, find the sum of the even-valued terms.

Solution

int i = Convert.ToInt32(Console.ReadLine()); List<decimal> list = new List<decimal>(); for (int j = 0; j < i; j++) {    list.Add(Convert.ToInt64(Console.ReadLine())); } foreach (decimal k in list) {    long b = 1;    long c = 2, d;    long sum = 0;    while (c < k)    {       sum += c;       d = b + (c << 0x01);       c = d + b + c;       b = d;    }    Console.WriteLine(sum); }

Project Euler #1: Multiples of 3 and 5

Hi guys, today I will show you how to solve Project Euler Problem 1, the question is

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Find the sum of all the multiples of 3 or 5 below 1000000000.

I tried to solve this question using for loop. It was working fine but it was taking so many times to get the result. Then I implemented some mathematical logic to solve this issue.

static void Main(String[] args) {             int i = Convert.ToInt32(Console.ReadLine());             List<long> list = new List<long>();             for (int j = 0; j < i; j++)             {                 list.Add(Convert.ToInt64(Console.ReadLine()));             }             foreach(long k in list)             {                 long sum=0;                 long i3 = (((k - 1) / 3) * (((k - 1) / 3) + 1)) / 2;                 sum += i3 * 3;                 long i5 = (((k - 1) / 5) * (((k - 1) / 5) + 1)) / 2;                 sum += i5 * 5;                 long i15 = (((k - 1) / 15) * (((k - 1) / 15) + 1)) / 2;                 sum -= i15 * 15;                 Console.WriteLine(sum);             }     }