If Statement in C#

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Operators in C#

Operators	Associativity	Type
( )	left to right	Parentheses
!		Logical NOT
* / %	left to right	Arithmetic and modulus
+ -	left to right	Arithmetic
< > <= >=	left to right	Relational
== !=	left to right	Relational
&&		Logical AND
\|\|		Logical OR
=	right to left	Assignment

Expressions in C#

Operator	Expression	Is true if
==	x == y	x is equal to y
!=	x != y	x is not equal to y
>	x > y	x is greater than y
<	x < y	x is less than y
>=	x >= y	x is greater than or equal to y
<=	x <= y	x is less than or equal to y

General form of If Statement


if(this condition is true)
    execute this statement;

If and Else Statement

Program


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            int a, b;
            Console.Write("Enter first number: ");
            a = Int32.Parse(Console.ReadLine());
            Console.Write("Enter second number: ");
            b = Int32.Parse(Console.ReadLine());
            if (a == b) //it checking if 'a' greater then 'b'
                Console.Write("First and Second is Equal to"); //then print this line.
            else //if not means less then or greater then to
                Console.Write("First and Second is Not Equal to"); //then print this line.
            Console.ReadKey(); //used for breaking screen.
        }
    }
}

Output

Hello
World!

Only If Statements

Program


using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication
{
    class Program
    {
        static void Main(string[] args)
        {
            int a, b;
            Console.Write("Enter first number: ");
            a=Int32.Parse(Console.ReadLine());
            Console.Write("Enter second number: ");
            b = Int32.Parse(Console.ReadLine());
            if (a > b) //it checking if 'a' greater then 'b'
                Console.Write("First is greater then Second."); //then print this line.
            if (a < b) //it checking if 'a' is less then 'b'
                Console.Write("First is less then Second."); //then print this line.
            if (a == b) //it checking if 'a' equal to 'b'
                Console.Write("First is equal to Second."); //then print this line.
            Console.ReadKey();
        }
    }
}

Output

Hello
World!

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