All Basic C# Programming

Following is a program snippet that contains all basic programs code in C#.

This may help any beginner, Mid-Level & might some times Experts too.

This snippet includes:

Odd-Even
Check Vowel
Count Vowels and Consonants
Leap Year
Factorial
HCF & LCM
Decimal to Binary
Summation of n numbers
Swapping with & without 3rd Variable
Reverse
Check Armstrong
Fibonacci Series
Remove Blank Space
Floyd's Triangle
Pascal's Triangle

using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace AllBasic
{
class Program
{
static void Main(string[] args)
{
Restart:
Console.WriteLine("Enter your query \n");
string read = Console.ReadLine();
if (read == "Odd-Even")
{
int range1 = Convert.ToInt32(Console.ReadLine());
int range2 = Convert.ToInt32(Console.ReadLine());
for (int i = range1; i <= range2; i++)
{
if (i % 2 == 0)
{
Console.WriteLine(i + " number is Even.\n");
}
else
{
Console.WriteLine(i + " number is Odd.\n");
}
}
Console.ReadLine();
goto Restart;
}
else if (read == "Check Vowel")
{
string[] vowels = { "a", "e", "i", "o", "u", "A", "E", "I", "O", "U" };
string getinput = Console.ReadLine();
if (vowels.Contains(getinput))
{
Console.WriteLine("Yes!" + getinput + " is a vowel.");
}
else
{
Console.WriteLine("No!" + getinput + " is not a vowel.");
}
Console.ReadLine();
goto Restart;
}
else if (read == "Count Vowels & Consonants")
{
string[] vowels = { "a", "e", "i", "o", "u", "A", "E", "I", "O", "U" };
string getinput = Console.ReadLine();
int vowelscnt = 0;
int consonantscnt = 0;
foreach (char character in getinput)
{
if (vowels.Contains(character.ToString()))
{
Console.WriteLine("Yes!" + character + " is a vowel.");
vowelscnt++;
}
else
{
Console.WriteLine("No!" + character + " is not a vowel.");
consonantscnt++;
}
}
Console.WriteLine("Total Vowels:" + vowelscnt + " and Consonants are:" + consonantscnt);
Console.ReadLine();
goto Restart;
}
else if (read == "Leap Year")
{
int getinput = Convert.ToInt32(Console.ReadLine());
if (getinput % 4 == 0)
{
Console.WriteLine("Yes!" + getinput + " is a leap year.");
}
else
{
Console.WriteLine("No!" + getinput + " is not a leap year.");
}
Console.ReadLine();
}
else if (read == "Factorial")
{
int getinput = Convert.ToInt32(Console.ReadLine());
int fact = 1;
for (int i = 1; i <= getinput; i++)
{
fact = fact * i;
}
Console.WriteLine("Factorial of " + getinput + "! is:" + fact);
Console.ReadLine();
goto Restart;
}
else if (read == "HCF & LCM")
{
Console.WriteLine("Enter two numbers:");
int getinput1 = Convert.ToInt32(Console.ReadLine());
int getinput2 = Convert.ToInt32(Console.ReadLine());
int temp;
int hcf; // or gcd
int lcm, x, y;
x = getinput1;
y = getinput2;
while (getinput2 != 0)
{
temp = getinput2;
getinput2 = getinput1 % getinput2;
getinput1 = temp;
}
hcf = getinput1;
lcm = (x * y) / hcf;
Console.WriteLine("Greatest Common Divisor of " + x + " & " + y + " is:" + hcf);
Console.WriteLine("Least Common Multiple of " + x + " & " + y + " is:" + lcm);
Console.ReadLine();
goto Restart;
}
else if (read == "HCF & LCM")
{
Console.WriteLine("Enter two numbers:");
int getinput1 = Convert.ToInt32(Console.ReadLine());
int getinput2 = Convert.ToInt32(Console.ReadLine());
int temp;
int hcf; // or gcd
int lcm, x, y;
x = getinput1;
y = getinput2;
while (getinput2 != 0)
{
temp = getinput2;
getinput2 = getinput1 % getinput2;
getinput1 = temp;
}
hcf = getinput1;
lcm = (x * y) / hcf;
Console.WriteLine("Greatest Common Divisor of " + x + " & " + y + " is:" + hcf);
Console.WriteLine("Least Common Multiple of " + x + " & " + y + " is:" + lcm);
Console.ReadLine();
goto Restart;
}
else if (read == "Decimal to Binary")
{
Console.WriteLine("Enter one number:");
/* Method 1*/
int getinput1 = Convert.ToInt32(Console.ReadLine());
string binary = Convert.ToString(getinput1, 2);
Console.WriteLine("Decimal to Binary of " + getinput1 + "by method1 is:" + binary);
/* Method 1*/
/* Method 2*/
const int mask = 1;
var binaynum = string.Empty;
while (getinput1 > 0)
{
// Logical AND the number and prepend it to the result string
binaynum = (getinput1 & 1) + binaynum;
getinput1 = getinput1 >> 1;
}
Console.WriteLine("Decimal to Binary of same by method2 is:" + binary);
/* Method 2*/
Console.ReadLine();
goto Restart;
}
else if (read == "Add Numbers")
{
Console.WriteLine("Enter two numbers:");
int getinput1 = Convert.ToInt32(Console.ReadLine());
int getinput2 = Convert.ToInt32(Console.ReadLine());
int sum = 0;
for (int i = getinput1; i <= getinput2; i++)
{
sum = sum + i;
}
Console.WriteLine("Addition of n numbers is:" + sum);
Console.ReadLine();
goto Restart;
}
else if (read == "Swap")
{
Console.WriteLine("Enter two number:");
int getinput1 = Convert.ToInt32(Console.ReadLine());
int getinput2 = Convert.ToInt32(Console.ReadLine());
int x, y;
x = getinput1;
y = getinput2;
/*Method 1-> using third variable*/
int temp;
temp = getinput1;
getinput1 = getinput2;
getinput2 = temp;
Console.WriteLine("Numbers swapped as:" + getinput1 + "& " + getinput2);
Console.ReadLine();
/*Method 1-> using third variable*/
/*Method 2-> without using third variable*/
x = y - x; // a=> b-a
y = x + y; // b=> a+b
x = x + y; // a=>b-a
Console.WriteLine("Numbers swapped as:" + getinput1 + "& " + getinput2);
Console.ReadLine();
goto Restart;
}
else if (read == "Reverse")
{
Console.WriteLine("Enter string:");
string input1 = Console.ReadLine();
/* Reverse String Method 1*/
string reversest = string.Empty;
Stack stack = new Stack();
foreach (char data in input1)
{
stack.Push(data);
}
foreach (var data in stack)
{
reversest += data;
}
Console.WriteLine("Reverse string of:" + input1 + "is " + reversest);
/* Reverse String Method 1*/
/* Reverse String Method 2*/
char[] chrarray = input1.ToCharArray();
string reversestring = string.Empty;
for (int i = chrarray.Length; i >= 1; i--)
{
reversestring += chrarray[i - 1];
}
Console.WriteLine("Reverse string of:" + input1 + "is " + reversestring);
/* Reverse String Method 2*/
Console.ReadLine();
goto Restart;
}
else if (read == "Armstrong")
{
Console.WriteLine("Enter Number:");
string getinput = Console.ReadLine();
char[] input1 = getinput.ToCharArray();
int length = input1.Length;
double x = Convert.ToDouble(getinput);
double armstrong = 0;
for (int i = 0; i <= length - 1; i++)
{
string num = input1[i].ToString();
int number = Convert.ToInt32(num);
armstrong = armstrong + Math.Pow(number, length);
}
if (armstrong == x)
{
Console.WriteLine("Yes! it's an Armstrong number.");
}
else
{
Console.WriteLine("No! it's not an Armstrong number.");
}
Console.ReadLine();
goto Restart;
}
else if (read == "Fibonacci")
{
Console.WriteLine("Enter two range as numbers:");
int getinput1 = Convert.ToInt32(Console.ReadLine());
int getinput2 = Convert.ToInt32(Console.ReadLine());
string fibonacci = string.Empty;
int temp = getinput1;
fibonacci = temp.ToString() + "," + getinput2.ToString();
for (int i = 0; i <= 10; i++)
{
temp = getinput1 + getinput2;
getinput1 = getinput2;
getinput2 = temp;
fibonacci += "," + getinput2;
}
Console.WriteLine("Fibonacci Series between two numbers is:" + fibonacci);
Console.ReadLine();
goto Restart;
}
else if (read == "Blank Space")
{
Console.WriteLine("Enter string:");
string getinput1 = Console.ReadLine();
/* Simple in c# due to function -> Replace*/
string newstring = getinput1.Replace(" ", "");
Console.WriteLine("String after removing blank space:" + newstring);
Console.ReadLine();
goto Restart;
}
else if (read == "Floyds Triangle")
{
for (int i = 0; i <= 20; i++)
{
for (int j = 0; j <= i; j++)
{
Console.Write(j + " ");
}
Console.Write("\n");
}
Console.ReadLine();
goto Restart;
}
else if (read == "Pascal Triangle")
{
for (int i = 1; i <= 10; i++)
{
for (int j = 1; j <= 10 - i; j++)
{
Console.Write(" ");
}
//for (int k = 20; k >= i; k--)
//{
// Console.Write(" " + k);
//}
for (int k = 1; k <= i; k++)
{
Console.Write(" " + k);
}
Console.Write("\n");
}
Console.ReadLine();
}
}
}
}