Decision using IF and ELSE

Before we can use a decision, we should learn about Relation Operator first, that can be found in the previous post.
Decision is needed to run any statement, depend on one or more condition.
For example, we want to decide whether a number we inserted is more than 60 or not.
The syntax is according o this format:
if (condition)
{statement}
Example:
if (x>60)
{cout<<”the number is more than 60”;}

We can add one more statement for the condition that opposite to the condition above, with else.
Example:
if (x>60)
{cout<<”the number is more than 60”;}
else
{cout<<”the number is not more than 60”;}

The complete syntax is shown by the example below:

#include "iostream.h"
#include "conio.h"
main()
{
int x;
cout<<"Insert a number: ";
cin>>x;
if (x>60)
{cout<<"the number is more than 60";}
else
{cout<<"the number is not more than 60";}
getch();
}

The result is looks like the picture below:
1. If we insert a number more than 60, for example 61, then the program will print: the number is more than 60, because the condition has TRUE value.


2. If we insert 60 or a number less than 60, for example 59, then the program will print: the number is not more than 60, because the condition has FALSE value.