if else statement in c++

The if statement lets you do something if a condition is true. If it isn’t true, nothing happens. But suppose we want to do one thing if a condition is true, and do something else if it’s false.
That’s where the if...else statement comes in. It consists of an if statement, followed by a statement or block of statements, followed by the keyword else, followed by another statement or block of statements.

Syntax

if (condition)
{
  statement;
}
else
 {
  statement;
 }

If the condition is true, the first statement is executed. If it is false, the second statement is executed.

Flow Diagram

if-else-statement in c++ language

Example

// ifelse.cpp
// demonstrates IF...ELSE statememt
#include using namespace std;

int main()
 {
   int x;

   cout > x;
   if( x > 100 )
     cout << “That number is greater than 100 ”;
   else
    cout << “That number is not greater than 100 ”;
  return 0;
 }

Output

Enter a number: 300
That number is greater than 100
Enter a number: 3
That number is not greater than 100