if else statement in C++.

if else statement

Syntax of the if - else statement

if (condition)

  statement1;

else

  statement2;

If-else Statement

• From the above flowchart it is clear that the given condition is evaluated first. If the condition is true, statement1  is executed. 
• If the condition is false, statement2 is executed. It should be kept in mind that statement and statement2 can be single or compound statement.

if example	if else example
if (x == 100)     cout << "x is 100";	if (x == 100)     cout << "x is 100"; else     cout << "x is not 100";

if-else-if example

if(percentage>=60)      cout<<"Ist division"; else if(percentage>=50)      cout<<"IInd division"; else if(percentage>=40)      cout<<"IIIrd division"; else      cout<<"Fail" ;

For Example

#include <iostream>

using namespace std;

int main ()

{

   // declare local variable

   int marks = 30;

   // check the boolean condition

   if( marks > 40 )

   {

       // if condition is true

       cout << "You are pass !!" << endl;

   }

   else

   {

       // if condition is false

       cout << "You are fail !!" << endl;

   }

   return 0;

}

Output :

You are fail !!

/* Program to find no. is even or odd*/

#include <iostream>

using namespace std;

int main() {

    int n;

    cout << "Enter an integer: ";

    cin >> n;

    if ( n%2 == 0) {

        cout << n << " is even.";

    }

    else {

        cout << n << " is odd.";

    }

    return 0;

}

Output

Enter an integer: 23

23 is odd.