If statement in C#

C# If statement

If statement is one of the flow control and conditional statements in C# programming language. Control flows change the execution flow of a programming language.

If someone for example, want to execute a particular statements based on some logic, then flow control and conditional statement come up.


The if statement is used to evaluate a Boolean expression before executing a set of statements. The statements are run if the expression evaluate to true else it will run another statement.

Syntax

if(boolean expression)
{
    //statements to run
}

Code
using system
namespace csharpnaijaDemo
{
   class program
   {
      static void main(string[] args)
      {
           int value=10;
           if(value <= 10)
            {
                  Consoile.WriteLine("value is less than or equal to 10");
             }
             Console.WriteLine();
       }
    }
}

if...else statement

if-else statement is a second part of the if statement in c#, that is the else. The else statement must follow if or else if statement. 

syntax

if(boolean expression)
{
    //execute this code block if boolean expression evaluates to true
}
else
{
  // execute this code block when if boolean expression evaluates to false
}

example

int i = 5, j = 10;

if (i > j)
{
    Console.WriteLine("i is greater than j");
}
else
{
    Console.WriteLine("i is either equal to or less than j");
}

else if statement

The if statement can also follow as else statement, if you want to check for another condition in the else part.

syntax

if(expression)

{

     // logic to be executed

}

else if{ //logic to be executed}

example
int i = 5, j = 10;

if (i > j)
    {Console.WriteLine("i is greater than j");}
else if (i < j)
   { Console.WriteLine("i is less than j");}
else if (i == j)
   { Console.WriteLine("i is equal to j");}