Hello  Friends !!

My name is Wajahat Sardar and today i am going to discuss about  decision making statement in a C++ program i,ll discuss about If-else statement. 

#Decision-making-statements

• If statement.
• If-else statement
• Else-if statement
• Nested if-else statement

      C++ If-else Statement.

   if(test-expression)

{  

    //Statement / statements ;

  }

else

{

       //Statement / statements ;

}

       How if-else statement work

• if test-expression inside the if  parenthesis is true, then the  statements inside the body of if is executed. 
• if the test-expression inside then if parenthesis is false,  then the statement inside the if body is skipped and control goes to the else statement and else statement executes.

        Flow chart

 

Simple if-else program

#include <iostream>

using namespace std;

int main()                            // Most important part of the program!

{

  int age;                            // Need a variable...

  cout<<"Please input your age: ";    // Asks for age

  cin>> age;                          // The input is put in age

  if ( age <= 30 ) {                  // If the age is less than 100

     cout<<"You are pretty young!\n"; // Just to show you it works..

}

  else {

    cout<<"You are really old\n";     // Executed if no other statement is

  }

return 0

}

Output :

Please input your age: 20

You are pretty young!

I hope you will like this. 

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