C++ if-else Statements

If else statements in C++ is also used to control the program flow based on some condition, only the difference is: it’s used to execute some statement code block if expression is evaluated to true, otherwise executes else statement code block.

The basic format of if else statement is:

Syntax:

if(test_expression)
{
   //execute your code
}
else
{
   //execute your code
}

Figure – Flowchart of if else Statement:

Example of a C++ Program to Demonstrate if else Statement

Example:

#include <iostream>
using namespace std;

int main()
{
  int a = 15, b = 20;

  if (b > a) {  
    cout << "b is greater" << endl;
  } else {  
    cout << "a is greater" << endl;
  }  
  system("PAUSE");
}

Program Output:

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